Manufacturer Seiko Caliber Number 5D44, 5D44A Type Kinetic Diameter 30.0mm Casing Diameter 28.0mm Thickness 6.25mm Jewels 12 Capacitor MT920 Manganese...
Manufacturer Seiko Caliber Number PC32, PC32A Type Quartz Lignes 10.5”’ Diameter 23.7mm Casing Diameter 18.10mm Thickness 4.15mm Jewels 0 Battery...
Manufacturer Seiko Caliber Number 2906, 2906A Movement Type Automatic Diameter 18mm (casing) Height 5.35mm Jewels 17 Vibrations Per Hour 28,800...
Diashock is the name of Seiko Watch Corporations’s proprietary anti-shock system (or shock absorber) for mechanical/automatic watch movements. It was...
The Magic Lever was introduced by Seiko in 1959 with the purpose of improving the efficiency of the winding system....
Manufacturer Seiko Caliber Number 9T82, 9T82A Type Kinetic Diameter Unknown Thickness Unknown Jewels 38 Capacitor Unknown Frequency 32,768 Hz (cycles...
Manufacturer Seiko Caliber Number 6R15 (A/B/C/D) Movement Type Automatic Diameter 27.40mm (outside), 27mm (casing) Height 5.25mm Jewels 23/24 Vibrations Per...
Manufacturer Seiko Caliber Number 7T92 / 7T92A Type Quartz Diameter 12”’ (24.1mm x 27.6mm) Thickness 3.3mm Jewels 0 Battery Cell...
Manufacturer Seiko Instruments (SII), Time Module (TMI) Caliber Number NE15B Base Caliber NE15 Movement Type Automatic Diameter 27.40mm Casing Diameter...
Manufacturer Seiko Caliber Number 4R36, 4R36A Movement Type Automatic Diameter 27.4mm (casing 27mm) Thickness 5.32mm Jewels 24 Vibrations Per Hour...
Manufacturer Seiko Caliber Number 4R35, 4R35A, 4R35B Movement Type Automatic Diameter 27.4mm (casing 27mm) Thickness 5.32mm Jewels 24 23 (see...
We have compiled all of the information related to the Seiko caliber 4R35 line of automatic movements into one post....
Manufacturer Seiko Caliber Number 7T62 / 7T62A Type Quartz Diameter 12”’ (24.1mm x 27.6mm) Thickness 3.3mm Jewels 0 Battery Cell...
Brand Seiko Caliber Number 5740C Base Caliber 5740 Movement Type Manual wind, mechanical Jewels 23 Vibrations Per Hour 36,000 bph...
What is the difference between Seiko/TMI/SII “NH” calibers? As of this post there are 10 calibers in the current line...
Manufacturer Seiko Caliber Number NH37A (aka NH37) Base Caliber NH35A Movement Type Automatic Jewels 24 Vibrations Per Hour 21,600 bph...
Brand Seiko Caliber Number 6117B Base Caliber 6117A Movement Type Automatic Jewels 17 Vibrations Per Hour 21,600 bph Power Reserve...
Brand Seiko Caliber Number 5R65 Movement Type Automatic Jewels 30 Diameter 30mm Height 5.1mm Power Reserve 70+ hours Frequency 32,768...
Manufacturer Seiko Caliber Number NH05A (aka NH05) Movement Type Automatic Jewels 21 Diameter 7 3/4”’ (17.5mm) Height 5.92mm Vibrations Per...
Manufacturer Seiko Caliber Number 7S36, 7S36C Movement Type Automatic Jewels 23 Vibrations Per Hour 21,600 bph Shock System Seiko Diashock...
Brand Seiko Caliber Number 8B43 Movement Type Solar Powered (Quartz) Jewels Unkown Crystal Oscillator Frequency 32,768 Hz (cycles per second)...
According to Grand Seiko: The caliber number is a four-digit number that indicates the model of a movement (mechanical part...
Manufacturer S. Epson Corp. (Seiko/Hatori) Caliber Number Y121E Type Quartz Size 6 3/4”’ x 8”’ (15.3mm x 18.1mm) Height 2.99mm...
[block]0[/block] There is a lot of confusion in the watch community about Seiko and Seiko-related watches and movements. Most of...
Brand Seiko Caliber Number 6309, 6309A Movement Type Automatic Jewels 17 Vibrations Per Hour 21,600 bph Power Reserve 47 hours...
Manufacturer Seiko Caliber Number 6R27 Base Caliber 6R15 (6R family) Movement Type Automatic Jewels 29 Vibrations Per Hour 28,800 bph...
Manufacturer Seiko Caliber Number 7S26 Movement Type Automatic Diameter 27.4mm Casing Diameter 27mm Height 4.8mm thick Jewels 21 Vibrations Per...
Manufacturer Seiko (SII, TMI) Caliber Number NH38A Movement Type Automatic Jewels 24 Vibrations Per Hour 21,600 bph Shock System? Yes...
[block]0[/block] What is the difference between Seiko caliber NH25 and NH35? There are some differences between these overall similar movements....
Brand Grand Seiko Caliber Number 9S85 / 9S85A Movement Type Automatic (Hi-Beat) Jewels 37 Power Reserve 55 hours Vibrations Per...
Brand Seiko Caliber Number 9S65 / 9S65A Movement Type Automatic Jewels 35 Power Reserve 72 hours Vibrations Per Hour 28,800...
Brand Seiko Caliber Number 6139B Movement Type Automatic Jewels 17 Vibrations Per Hour 21,600 bph Diameter 27mm Thickness 7.1mm Shock...
Manufacturer Seiko Caliber Number 6R21, 6R21A Vibrations Per Hour 28,800 bph Power Reserve 45+ hours Jewels 29 Parts 208 Hacking...
Manufacturer Seiko Caliber Number 9F62, 9F62A In-House Yes Accuracy +/-10 seconds per year Battery Number 371/370/SR920S,SR920SW Power Reserve 3 year...
Manufacturer Seiko Caliber Number NH35A (aka NH35) Movement Type Automatic Jewels 24 Vibrations Per Hour 21,600 bph Lift Angle 53...
Brand Seiko Caliber Number 7002, 7002A Movement Type Automatic Diameter 12”’ (27mm) Thickness 4.5mm Jewels 17 Vibrations Per Hour 21,600...
This movement enables the watch to receive GPS signals from the Global Positioning System satellites. That signal sends the precise time and date to the watch based on the location of the wearer and information from the atomic clock which is accurate within 1 sec every 100,000 or so yrs.
Seiko caliber 9R86 found in the Grand Seiko Spring Drive model SBGC005. 50 jewels and consisting of 416 parts. Made in Japan.
Seiko caliber 8R28 found in an Ananta model SRQ011. This automatic chronograph movement has 34 jewels, power reserve of 45+ hours, consists of 292 parts, and beats at 28,800 vph. It has a column wheel and vertical clutch. Made in Japan.
Seiko in-house caliber 9S66 found in a Grand Seiko GMT Limited Edition. This caliber is essentially an upgrade from GS cal. 9S56 which offered a lower 48 hr power reserve.
Tag Heuer's pseudo in-house caliber 1887 automatic movement found in a Carrera model CAR2012-0. 39 Jewels, Swiss made. Based off a Seiko TC78 movement or 6S37.