Seiko Cal. 6638 - 776

Seiko 6638-776

The 6638-776 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6638 caliber with 36j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-d7b439c33946]

Also known as: Samurai, Shogun

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
44mm
Case Thickness
14.5mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1991

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seikata-wm-d7b439c33946