Seiko Cal. 4550 - 637

This Spring Drive model from 1968 features a 43mm Hardlex-Coated Steel case. It features a Silver dial protected by a Hardlex crystal and offers 110m of water resistance. [seikata-wm-110cecb05d8d]

Also known as: Goldfeather, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1968

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