Seiko Cal. 4540 - 441

This Automatic model from 1979 features a 38mm Stainless Steel case. It features a Navy dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-7c82c490ace3]

Also known as: Monster, Bullhead

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1979

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