Seiko Cal. 6637 - 112

The 6637-112 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6637 caliber with 28j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-68ac04480c71]

Also known as: Helmet, Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

28j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1984

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