Seiko Cal. 4427 - 476

This Spring Drive model from 1977 features a 39mm Hardlex-Coated Steel case. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-5d6d961194c3]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1977

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