Seiko Cal. 6691 - 495

This Spring Drive model from 1968 features a 40mm Hardlex-Coated Steel case. Powered by the 6691 caliber with 32j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-79bd45cbdddf]

Also known as: UFO, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1968

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