Seiko Cal. 6637 - 416

Released in 1970, the Cal. 6637 with design code 416 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 130m of water resistance. [seikata-wm-fefb6ec0d804]

Also known as: World Timer

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

130m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1970

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