Seiko Cal. 6690 - 507

The Seiko 6690-507 represents an important milestone in Seiko's 1966 lineup. It features a Cream dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-6400b76aeb3b]

Also known as: Tuna, Arnie

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1966

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