Seiko Cal. 6637 - 588

This Solar model from 1967 features a 35mm PVD Black case. It features a Champagne dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-46050a8f54d3]

Also known as: Sumo, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1967

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