Seiko Cal. 6637 - 899

This Quartz model from 1989 features a 41mm Two-Tone case. Powered by the 6637 caliber with 33j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-3df31b428d37]

Also known as: Tuna, Flighty

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1989

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