Seiko Cal. 4436 - 285

This Automatic model from 1988 features a 37mm Hardlex-Coated Steel case. Powered by the 4436 caliber with 30j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-4054c5e89e06]

Also known as: Bullhead, Helmet

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1988

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