Seiko Cal. 6636 - 838

Seiko 6636-838

The 6636-838 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6636 caliber with 21j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-1dd6086ac096]

Also known as: Bellmatic, Sea Horse

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
15.8mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
190m
Dial Color
Navy
Jewels
21j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1992

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