Seiko Cal. 4437 - 270

This Hand-Winding model from 1977 features a 34mm Hardlex-Coated Steel case. Powered by the 4437 caliber with 36j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-ab6f1b98d356]

Also known as: Bullhead, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1977

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