Seiko Cal. 5637 - 843

This Spring Drive model from 1983 features a 38mm Gold-Plated case. It features a Silver dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-1476460db55d]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

20j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1983

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