Seiko Cal. 4421 - 152

This Automatic model from 1977 features a 36mm Hardlex-Coated Steel case. It features a Navy dial protected by a Mineral crystal and offers 190m of water resistance. [seikata-wm-cf0563f6c11c]

Also known as: Monster, Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1977

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