Seiko Movements Hierarchy – A Reference Guide to Seiko Calibers

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!
Please leave a comment with the next caliber you would like to see!

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.

Please note: As an Amazon Associate I earn from qualifying purchases.

Seiko Caliber 7S26

7S26 Movement Specs

Caliber7S26
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+50/-20 sec per day
Power Reserve41
Jewels21
ComplicationsDay-Date at 3
Hacking / Hand-windingN / N

Seiko Watch Models with the Caliber 7S26

  • Seiko 5: SNK803, SNK805, SNK807, SNK809, SNK357
  • SKX Divers: SKX007, SKX009, SKX011, SKX013, SKX015, SKX017
  • Recraft: SNKP23, SNKP25, SNKP27, SNKM97
  • Other: SNKE51, SNKE57, SNKE93, SNKG23, SNKK07, SNKL19, SNKL77, SNKL83, SNKM83, SNKM92, SNKN11, SNKN43, SNKN51, SNKP23, SNKP25

Seiko Caliber 7S36

7S36 Movement Specs

Caliber7S36
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+50/-20 sec per day
Power Reserve41
Jewels23
ComplicationsDay-Date at 3
Hacking / Hand-windingN / 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

Caliber4R35
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+45/-35 sec per day
Power Reserve40
Jewels23 / 24
ComplicationsDate at 3
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 4R35

  • Samurai: SBDY029, SBDY043, SRPB49, SRPB53, SRPB55, SRPB99, SRPC93
  • Mini Turtle: SRPC35, SRPC37, SRPC39, SRPC41
  • Presage Cocktail Time: SARY133 / SRPD37, SARY139 / SRPD39, SARY141 / SRPD41, SRPC81, SRRY025 / SRP855, SRRY027 / SRP853
  • Other: SRPC89, SRPB85, SRPC17, SRPB91, SRPB89, SRPB94, SRPB81, SRPB46

Seiko Caliber 4R36

4R36 Movement Specs

Caliber4R36
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+45/-35 sec per day
Power Reserve40
Jewels24
ComplicationsDay-Date at 3
Hacking / Hand-windingY / 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, SRPC91
  • King Turtle: SBDY049, SBDY051
  • Monster (4th Gen): SBDY035, SBDY037, SRPD27, SRPD25
  • Prospex Land Field Compass: SRPD31, SRPD33, SRPD35
  • Seiko 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, SRPD85K1
  • Seiko 5 Sports: SRPC61, SRPC63
  • Other: SRP601, SRPC67, SRPC55, SRPC57, SRP481, SRPC61, SRPC65, SRPC63, SRP605, SRPC59, SRPB37

Seiko Caliber 4R37

4R37 Movement Specs

Caliber4R37
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+45/-30 sec per day
Power Reserve40
Jewels24
ComplicationsDate at 3/4
24-Hour Hand at 10:30
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 4R37

  • SSA383, SSA391, SSA381, SSA389

Seiko Caliber 4R38

4R38 Movement Specs

Caliber4R36
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+45/-35 sec per day
Power Reserve40
Jewels24
ComplicationsOpen Heart at 9
Hacking / Hand-windingY / 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

Caliber4R39
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+45/-35 sec per day
Power Reserve40
Jewels24
ComplicationsOpen Heart at 9, 24-hour subdial at 10
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 4R39

  • Presage Open Heart w/24-hour Subdial: SSA367
  • SSA231

Seiko Caliber 4R57

4R57 Movement Specs

Caliber4R57
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+45/-35 sec per day
Power Reserve41
Jewels29
ComplicationsPower Reserve Indicator, Date pointer at 6
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 4R57

  • Presage Power Reserve: SARY135 / SSA393, SARY145 / SSA397, SSA395J1

Seiko Caliber 6R15

6R15 Movement Specs

Caliber6R15
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+25/-15 sec per day
Power Reserve50
Jewels23 / 24
ComplicationsDate at 3
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 6R15

  • Alpinist (1st Gen): SARB017
  • Spirit (SARB): SARB033, SARB035
  • Presage / “Baby GS”: SARX029, SARX033, SARX035, SARX045, SARX047, SARX049 / SPB047, SARX051, SARX055, SARX057
  • Transocean: SBDC039
  • SBDC 200m Divers: SBDC051, SBDC053, SBDC055, SBDC061, SBDC063, SBDC065 / SPB083, SBDC067, SBDC085, SPB071J1
  • Monster (3rd Gen): SBDC067, SBDY033, SZSC003
  • Seiko Sumo: SBDC003, SBDC001, SBDC069

Seiko Caliber 6R21

6R21 Movement Specs

Caliber6R21
MovementAutomatic
Frequency28,800 VPH
Ticks per Second8
Accuracy+25/-15 sec per day
Power Reserve45
Jewels29
ComplicationsPower Reserve at 9
Date Pointer at 6
Day Pointer at 3
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 6R21

  • Presage Day/Date Power Reserve: SARW021, SARW023

Seiko Caliber 6R24

6R24 Movement Specs

Caliber6R24
MovementAutomatic
Frequency28,800 VPH
Ticks per Second8
Accuracy+25/-15 sec per day
Power Reserve45
Jewels29
ComplicationsPower Reserve at 9
Retrograde Date at 6
Retrograde Day at 3
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 6R24

  • Presage “Urushi” Power Reserve Day/Date Retrograde: SARD011

Seiko Caliber 6R27

6R27 Movement Specs

Caliber6R27
MovementAutomatic
Frequency28,800 VPH
Ticks per Second8
Accuracy+25/-15 sec per day
Power Reserve45
Jewels29
ComplicationsPower Reserve at 9
Date Pointer at 6
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 6R27

  • Presage Power Reserve: SARW013, SARW025 / SPB059, SARW041

Seiko Caliber 6R35

6R35 Movement Specs

Caliber6R35
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+25/-15 sec per day
Power Reserve70
Jewels24
ComplicationsDate at 3
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 6R35

  • Alpinist (2nd Gen): SBDC087 / SPB117, SBDC089 / SPB119, SBDC091 / SPB121, SBC093
  • Sumo (3rd Gen): SBDC081 / SPB103, SBDC083 / SPB101
  • Presage Enamel: SPB111

Seiko Caliber 6R64

6R64 Movement Specs

Caliber6R64
MovementAutomatic
Frequency28,800 VPH
Ticks per Second8
Accuracy+25/-15 sec per day
Power Reserve45
Jewels29
ComplicationsPower Reserve at 6
GMT
Date Pointer at 3
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 6R64

  • Landmaster: SBEJ001

Seiko Caliber 8L35

8L35 Movement Specs

Caliber8L35
MovementAutomatic
Frequency28,800 VPH
Ticks per Second8
Accuracy+15/-10 sec per day
Power Reserve50
Jewels26
ComplicationsDate at 3
Hacking / Hand-windingY / 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

Caliber8R48
MovementAutomatic
Frequency28,800 VPH
Ticks per Second8
Accuracy+25/-15 sec per day
Power Reserve45
Jewels34
ComplicationsChronograph
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 8R48

  • Presage Chronograph: SARK013 / SRQ023, SARK015 / SRQ031

Seiko Caliber 5R65

5R65 Movement Specs

Caliber5R65
MovementSpring Drive
Frequency28,800 VPH
Ticks per Second
Accuracy+0.5/-0.5 sec per day
Power Reserve72
Jewels30
ComplicationsPower Reserve Indicator
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 5R65

  • LX Marinemaster & MM Tuna: SBDB013, SBDB027 / SNR029

Seiko Caliber 5R66

5R66 Movement Specs

Caliber5R66
MovementSpring Drive
Frequency28,800 VPH
Ticks per Second
Accuracy+0.5/-0.5 sec per day
Power Reserve72
Jewels30
ComplicationsPower Reserve Indicator
GMT
Hacking / Hand-windingY / Y

Seiko Watch Models with the Caliber 5R66

  • Marinemaster 600M: SBDB011
  • Landmaster: SBDB015, SBDB023 / SNR027, SBDB029 / SNR025

Grand Seiko Caliber 9R65

9R65 Movement Specs

Caliber9R65
MovementSpring Drive
Frequency28,800 VPH
Ticks per Second
Accuracy+1/-1 sec per day
Power Reserve72
Jewels30
ComplicationsPower Reserve Indicator
Hacking / Hand-windingY / 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

Caliber9R66
MovementSpring Drive
Frequency28,800 VPH
Ticks per Second
Accuracy+1/-1 sec per day
Power Reserve72
Jewels30
ComplicationsPower Reserve Indicator
GMT
Hacking / Hand-windingY / 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

Caliber9S85
MovementAutomatic Hi-Beat
Frequency36,000 VPH
Ticks per Second10
Accuracy+8/-1 sec per day
Power Reserve72
Jewels37
ComplicationsN/A
Hacking / Hand-windingY / 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

Caliber9S86
MovementAutomatic Hi-Beat
Frequency36,000 VPH
Ticks per Second10
Accuracy+8/-1 sec per day
Power Reserve72
Jewels37
ComplicationsN/A
Hacking / Hand-windingY / 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

CaliberNH35A / NH35
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+40/-20 sec per day
Power Reserve41
Jewels24
ComplicationsDate
Hacking / Hand-windingY / 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 if you’re interested

SII Caliber NH36A

NH36A Movement Specs

CaliberNH36A / NH36
MovementAutomatic
Frequency21,600 VPH
Ticks per Second6
Accuracy+40/-20 sec per day
Power Reserve41
Jewels24
ComplicationsDay-Date
Hacking / Hand-windingY / 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

Caliber7C46
MovementHi-Tech Quartz
FrequencyN/A
Ticks per Second1
Accuracy+0.5/-0.5 sec per day
Power Reserve5 years
Jewels7
ComplicationsDigital Display
Hacking / Hand-windingY / 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

2 thoughts on “Seiko Movements Hierarchy – A Reference Guide to Seiko Calibers”

  1. Intriguing post. I Have Been trying to organize info about the movements, so a debt
    of gratitude is in order for posting. Cool resource.

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