Seiko Cal. 6640 - 686

This Automatic model from 1983 features a 41mm Two-Tone case. Powered by the 6640 caliber with 30j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-f08ac5cc8bea]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1983

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