Seiko Cal. 6640 - 581

This Kinetic model from 1976 features a 40mm Two-Tone case. It features a Silver dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-2b9cc91a75d8]

Also known as: Navigator

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1976

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