Seiko Cal. 6397 - 635

Seiko 6397-635

The 6397-635 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6397 caliber with 21j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-1f3082769c18]

Also known as: Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
46mm
Case Thickness
13.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
160m
Dial Color
Green
Jewels
21j
Frequency
36,000 bph
Power Reserve
53 hours
Year
1975

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seikata-wm-1f3082769c18