Seiko Cal. 4577 - 633

This Automatic model from 1978 features a 46mm PVD Black case. It features a Navy dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-4edce2bf7c17]

Also known as: Sumo, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1978

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