Seiko Cal. 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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