Seiko Cal. 4550 - 635

This Spring Drive model from 1965 features a 36mm Hardlex-Coated Steel case. It features a Silver dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-058267b8d390]

Also known as: Silverwave, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1965

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