Seiko Cal. 6637 - 781

This Solar model from 1966 features a 40mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-cf3dc8841b47]

Also known as: Turtle

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1966

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