Image Credit: Grand Seiko
I often see movement numbers (calibers) and I have to google around multiple sources for the information I need. As such, I’ve compiled this handy reference guide that will tell you pertinent information.
Purpose of the Guide This guide will allow you to quickly identify the BPH/VPH (Frequency), ticks per second, Jewels, Power Reserve, accuracy, Hacking/Hand-winding capacity, and complications of all the most-used Seiko movements. Please bookmark this page if you find it a handy reference.
I could use your help to keep growing this page !
In addition, I will include a list of some of Seiko’s most popular watches that house these movements for a comprehensive cheat sheet. You can see a few product links under these sections, which will show you the price range and product images of watches bearing those movements.
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Seiko Caliber 7S26 7S26 Movement Specs Caliber 7S26 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +50/-20 sec per day Power Reserve 41 Jewels 21 Complications Day-Date at 3 Hacking / Hand-winding N / N
Seiko Watch Models with the Caliber 7S26 Seiko 5: SNK803, SNK805, SNK807, SNK809, SNK357SKX Divers: SKX007, SKX009, SKX011, SKX013, SKX015, SKX017Recraft: SNKP23, SNKP25, SNKP27, SNKM97Other : SNKE51, SNKE57, SNKE93, SNKG23, SNKK07, SNKL19, SNKL77, SNKL83, SNKM83, SNKM92, SNKN11, SNKN43, SNKN51, SNKP23, SNKP25
Seiko Caliber 7S36 7S36 Movement Specs Caliber 7S36 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +50/-20 sec per day Power Reserve 41 Jewels 23 Complications Day-Date at 3 Hacking / Hand-winding N / N
Seiko Watch Models with the Caliber 7S36 Seiko 5 Sports: SNZF15, SNZF17, SNZG09, SNZG11, SNZG13, SNZG15, SNZH55, SNZH57, SNKL75, SNZF22, SNZH53, SNZH53
Seiko Caliber 4R35 4R35 Movement Specs Caliber 4R35 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +45/-35 sec per day Power Reserve 40 Jewels 23 / 24 Complications Date at 3 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 4R35 Samurai : SBDY029, SBDY043, SRPB49, SRPB53, SRPB55, SRPB99, SRPC93Mini Turtle: SRPC35, SRPC37, SRPC39, SRPC41Presage Cocktail Time: SARY133 / SRPD37, SARY139 / SRPD39, SARY141 / SRPD41, SRPC81, SRRY025 / SRP855, SRRY027 / SRP853Other : SRPC89, SRPB85, SRPC17, SRPB91, SRPB89, SRPB94, SRPB81, SRPB46
Seiko Caliber 4R36 4R36 Movement Specs Caliber 4R36 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +45/-35 sec per day Power Reserve 40 Jewels 24 Complications Day-Date at 3 Hacking / Hand-winding Y / Y
The Caliber 4R36 is very popular in many of the best Seiko dive watches .
Seiko Watch Models with the Caliber 4R36 Turtle : SBDY013, SBDY017, SBDY023, SBDY027 / SRPD11, SBDY031, SBDY039, SBDY041, SRP773, SRP775, SRP777, SRP779, SRPA21, SRPC25, SRPC91King Turtle: SBDY049, SBDY051Monster (4th Gen) : SBDY035, SBDY037, SRPD27, SRPD25Prospex Land Field Compass : SRPD31, SRPD33, SRPD35Seiko 5 Sports 5KX : SRPD51K1, SRPD51K2, SRPD53K1, SRPD55K1, SRPD55K2, SRPD55K3, SRPD57K1, SRPD59K1, SRPD61K1, SRPD63K1, SRPD65K1, SRPD65K2, SRPD65K3, SRPD65K4, SRPD67K1, SRPD69K1, SRPD71K1, SRPD71K2, SRPD73K1, SRPD73K2, SRPD75K1, SRPD76K1, SRPD77K1, SRPD79K1, SRPD81K1, SRPD83K1, SRPD85K1Seiko 5 Sports : SRPC61, SRPC63Other : SRP601, SRPC67, SRPC55, SRPC57, SRP481, SRPC61, SRPC65, SRPC63, SRP605, SRPC59, SRPB37
Seiko Caliber 4R37 4R37 Movement Specs Caliber 4R37 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +45/-30 sec per day Power Reserve 40 Jewels 24 Complications Date at 3/4 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 4R37 SSA383, SSA391, SSA381, SSA389
Seiko Caliber 4R38 4R38 Movement Specs Caliber 4R36 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +45/-35 sec per day Power Reserve 40 Jewels 24 Complications Open Heart at 9 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 4R38 Presage Open Heart : SARY155 / SSA405, SARY159 / SSA409, SRRY035 / SSA785, SRRY039 / SSA781
Seiko Caliber 4R39 4R39 Movement Specs Caliber 4R39 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +45/-35 sec per day Power Reserve 40 Jewels 24 Complications Open Heart at 9, 24-hour subdial at 10 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 4R39 Presage Open Heart w/24-hour Subdial : SSA367SSA231
Seiko Caliber 4R57 4R57 Movement Specs Caliber 4R57 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +45/-35 sec per day Power Reserve 41 Jewels 29 Complications Power Reserve Indicator, Date pointer at 6 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 4R57 Presage Power Reserve : SARY135 / SSA393, SARY145 / SSA397, SSA395J1
Seiko Caliber 6R15 6R15 Movement Specs Caliber 6R15 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +25/-15 sec per day Power Reserve 50 Jewels 23 / 24 Complications Date at 3 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 6R15 Alpinist (1st Gen) : SARB017Spirit (SARB) : SARB033, SARB035Presage / “Baby GS” : SARX029, SARX033, SARX035, SARX045, SARX047, SARX049 / SPB047, SARX051, SARX055, SARX057Transocean : SBDC039SBDC 200m Divers : SBDC051, SBDC053, SBDC055, SBDC061, SBDC063, SBDC065 / SPB083, SBDC067, SBDC085, SPB071J1Monster (3rd Gen) : SBDC067, SBDY033, SZSC003Seiko Sumo : SBDC003, SBDC001, SBDC069
Seiko Caliber 6R21 6R21 Movement Specs Caliber 6R21 Movement Automatic Frequency 28,800 VPH Ticks per Second 8 Accuracy +25/-15 sec per day Power Reserve 45 Jewels 29 Complications Power Reserve at 9 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 6R21 Presage Day/Date Power Reserve : SARW021, SARW023
Seiko Caliber 6R24 6R24 Movement Specs Caliber 6R24 Movement Automatic Frequency 28,800 VPH Ticks per Second 8 Accuracy +25/-15 sec per day Power Reserve 45 Jewels 29 Complications Power Reserve at 9 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 6R24 Presage “Urushi” Power Reserve Day/Date Retrograde : SARD011
Seiko Caliber 6R27 6R27 Movement Specs Caliber 6R27 Movement Automatic Frequency 28,800 VPH Ticks per Second 8 Accuracy +25/-15 sec per day Power Reserve 45 Jewels 29 Complications Power Reserve at 9 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 6R27 Presage Power Reserve : SARW013, SARW025 / SPB059, SARW041
Seiko Caliber 6R35 6R35 Movement Specs Caliber 6R35 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +25/-15 sec per day Power Reserve 70 Jewels 24 Complications Date at 3 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 6R35 Alpinist (2nd Gen) : SBDC087 / SPB117, SBDC089 / SPB119, SBDC091 / SPB121, SBC093Sumo (3rd Gen): SBDC081 / SPB103, SBDC083 / SPB101Presage Enamel : SPB111
Seiko Caliber 6R64 6R64 Movement Specs Caliber 6R64 Movement Automatic Frequency 28,800 VPH Ticks per Second 8 Accuracy +25/-15 sec per day Power Reserve 45 Jewels 29 Complications Power Reserve at 6 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 6R64
Seiko Caliber 8L35 8L35 Movement Specs Caliber 8L35 Movement Automatic Frequency 28,800 VPH Ticks per Second 8 Accuracy +15/-10 sec per day Power Reserve 50 Jewels 26 Complications Date at 3 Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 8L35 Marinemaster & MM Emperor Tuna: SBDX013, SBDX014, SBDX017 / SLA021, SBDX023 / SLA021, SBDX025 / SLA023
Seiko Caliber 8R48 8R48 Movement Specs Caliber 8R48 Movement Automatic Frequency 28,800 VPH Ticks per Second 8 Accuracy +25/-15 sec per day Power Reserve 45 Jewels 34 Complications Chronograph Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 8R48 Presage Chronograph: SARK013 / SRQ023, SARK015 / SRQ031
Seiko Caliber 5R65 5R65 Movement Specs Caliber 5R65 Movement Spring Drive Frequency 28,800 VPH Ticks per Second ∞ Accuracy +0.5/-0.5 sec per day Power Reserve 72 Jewels 30 Complications Power Reserve Indicator Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 5R65 LX Marinemaster & MM Tuna: SBDB013, SBDB027 / SNR029
Seiko Caliber 5R66 5R66 Movement Specs Caliber 5R66 Movement Spring Drive Frequency 28,800 VPH Ticks per Second ∞ Accuracy +0.5/-0.5 sec per day Power Reserve 72 Jewels 30 Complications Power Reserve Indicator Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 5R66 Marinemaster 600M: SBDB011Landmaster: SBDB015, SBDB023 / SNR027, SBDB029 / SNR025
Grand Seiko Caliber 9R65 9R65 Movement Specs Caliber 9R65 Movement Spring Drive Frequency 28,800 VPH Ticks per Second ∞ Accuracy +1/-1 sec per day Power Reserve 72 Jewels 30 Complications Power Reserve Indicator Hacking / Hand-winding Y / Y
Grand Seiko Watch Models with the Caliber 9R65 Grand Seiko: SBGA201, SBGA203, SBGA211, SBGA229, SBGA231, SBGA259, SBGA283, SBGA285, SBGA293, SBGA373, SBGA375, SBGA387, SBGA401, SBGA407, SBGA413, SBGA415
Grand Seiko Caliber 9R66 9R66 Movement Specs Caliber 9R66 Movement Spring Drive Frequency 28,800 VPH Ticks per Second ∞ Accuracy +1/-1 sec per day Power Reserve 72 Jewels 30 Complications Power Reserve Indicator Hacking / Hand-winding Y / Y
Grand Seiko Watch Models with the Caliber 9R66 Grand Seiko GMT: SBGE251, SBGE248, SBGE201, SBGE205, SBGE211, SBGE215, SBGE227
Grand Seiko Caliber 9S85 9S85 Movement Specs Caliber 9S85 Movement Automatic Hi-Beat Frequency 36,000 VPH Ticks per Second 10 Accuracy +8/-1 sec per day Power Reserve 72 Jewels 37 Complications N/A Hacking / Hand-winding Y / Y
Grand Seiko Watch Models with the Caliber 9S85 Grand Seiko: SBGH279, SBGH277, SBGH281, SBGH279, SBGH269, SBGH271, SBGH273, SBGH254, SBGH252, SBGH201, SBGH205, SBGH213, SBGH255, SBGH263
Grand Seiko Caliber 9S86 9S86 Movement Specs Caliber 9S86 Movement Automatic Hi-Beat Frequency 36,000 VPH Ticks per Second 10 Accuracy +8/-1 sec per day Power Reserve 72 Jewels 37 Complications N/A Hacking / Hand-winding Y / Y
Grand Seiko Watch Models with the Caliber 9S86 Grand Seiko GMT : SBGJ235, SBGJ201, SBGJ203, SBGJ211, SBGJ213, SBGJ217, SBGJ219, SBGJ233
SII Caliber NH35A NH35A Movement Specs Caliber NH35A / NH35 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +40/-20 sec per day Power Reserve 41 Jewels 24 Complications Date Hacking / Hand-winding Y / Y
Notes on the Caliber NH35A This is an un-branded version of the Seiko Caliber 4R35 SII stands for Seiko Instrument Inc. I have a full review of the SII NH35a
SII Caliber NH36A NH36A Movement Specs Caliber NH36A / NH36 Movement Automatic Frequency 21,600 VPH Ticks per Second 6 Accuracy +40/-20 sec per day Power Reserve 41 Jewels 24 Complications Day-Date Hacking / Hand-winding Y / Y
Notes on the Caliber NH36A This is an un-branded version of the Seiko Caliber 4R36 SII stands for Seiko Instrument Inc.
Seiko Caliber 7C46 7C46 Movement Specs Caliber 7C46 Movement Hi-Tech Quartz Frequency N/A Ticks per Second 1 Accuracy +0.5/-0.5 sec per day Power Reserve 5 years Jewels 7 Complications Digital Display Hacking / Hand-winding Y / Y
Seiko Watch Models with the Caliber 7C46 Quartz Marinemaster Tuna: SBBN025, SBBN031, SBBN033, SBBN035, SBBN037
Reference Notes Accuracy Metrics
Accuracy is usually given as a range in terms of +/- seconds per day. All accuracy metrics have been converted to a daily basis for apples-to-apples comparison. Most of the time watches will be more accurate than the stated movement accuracy. This is because the stated movement accuracy is just the manufacturer’s minimum accuracy guarantee. Salient Quotes About Caliber Accuracy “Again, a caliber’s grade is strictly *not* defined by its accuracy, but by the ability to *maintain* the same level of accuracy in many years to come ” –jerouy ” Accuracy is an open ended question that really has no diffinitive bedrock scale to measure against when completely new & out of the box except for the standards as published for the caliber.” –Poseidon-Jim Complications
“Date” means numbered date from 1 to 31. As in “what’s today’s date?” “Day” refers to “day of the week” “Day-Date” complications means it has both
Hey everyone – my name is Tom, and I’m a watch collector and enthusiast. I’m glad you found this blog because there are so many generic content farms out there tailored to make you buy random watches instead of the best choice for your criteria.
In this blog, I only recommend the best watch picks for your criteria after personally thinking about what you’re looking for, researching for hours, and cherry picking the top choices for long-term reliable use. I hope you get some value from this site, and thanks for stopping in!
Intriguing post. I Have Been trying to organize info about the movements, so a debt
of gratitude is in order for posting. Cool resource.
Thanks Zach – I use it as a reference all the time so I’m glad it’s helpful!
The 5R65 and 5R66 do not have an accuracy of -.5/+.5. It’s +15/-15 per day. The 9R65 and 9R66 is more accurate then the mentioned above.
Hi Jake – thanks for stopping by!
My research indicates that the 5R65 is a Spring Drive movement with +/15 sec per month, which I standardized into a “per day” accuracy of +/- 0.5 sec/day.
Source: https://www.gnomonwatches.com/products/marine-master-pro-600m-springdrive-tuna-ref-sbdb013
The 9R65 is listed on the Grand Seiko site as having an accuracy of “±1 second per day / ±15 seconds per month (average)” so this is what I used.
Mathematically the accuracy is near equivalent, but the difference is in rounding error.
Hope that clears it up!