Seiko Cal. 5633 - 187

The Seiko 5633-187 represents an important milestone in Seiko's 1976 lineup. It features a Silver dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-b7d747214b86]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

12.3mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1976

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