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Grand Seiko
Ananta
Spring Drive Moon Phase
Spring Drive Chronograph
Spring Drive GMT
Automatic Chronograph
Automatic Chronograph Diver’s
Double Retrograde Automatic
Multi-hand Automatic
Spring Drive
Sportura
Premier
Velatura
Arctura
Specialty
Spring Drive GMT
Features of Spring Drive GMT
Cal.5R66
GMT hand
Power reserve : 72 hours
30 jewels, 296 parts
Movement diameter : 30.0 mm
Movement depth : 5.8mm
Products
SNR019J1
SNR021J1
For further details, please see the Spring Drive website.
Spring Drive Website