Seiko Cal. 6631 - 537

This Kinetic model from 1977 features a 41mm Stainless Steel case. It features a Silver dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-9a88c9cde6b4]

Also known as: World Timer

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1977

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