Seiko Cal. 6637 - 274

The 6637-274 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6637 caliber with 19j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-f7f902ebec6d]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1970

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