Manufacturer Grand Seiko Caliber Number T-Zero (T0) Movement Type Tourbillon, manual-wind In-House? Yes Diameter 36mm Thickness 8.22mm (total) Jewels 43...
Grand Seiko
Manufacturer Seiko Caliber Number 8L55, 8L55A Movement Type Automatic In-House? Yes Diameter (needs confirmed) Casing Diameter (needs confirmed) Height (needs...
Brand Seiko Caliber Number 5740C Base Caliber 5740 Movement Type Manual wind, mechanical Jewels 23 Vibrations Per Hour 36,000 bph...
According to Grand Seiko: The caliber number is a four-digit number that indicates the model of a movement (mechanical part...
What is the difference between Seiko caliber NH25 and NH35? There are some differences between these overall similar movements. The...
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...
Manufacturer Seiko Caliber Number 9F62, 9F62A In-House Yes Accuracy +/-10 seconds per year Battery Number 371/370/SR920S,SR920SW Power Reserve 3 year...
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.