Seiko Cal. 6634 - 738

Seiko 6634-738

The 6634-738 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6634 caliber with 36j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-2da07bcc90d0]

Also known as: Sumo

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
44mm
Case Thickness
14.6mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
100m
Dial Color
Green
Jewels
36j
Frequency
21,600 bph
Power Reserve
59 hours
Year
1968

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seikata-wm-2da07bcc90d0