Seiko Cal. 6638 - 543

This Hand-Winding model from 1979 features a 35mm Two-Tone case. Powered by the 6638 caliber with 18j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-e1bc6c49a169]

Also known as: UFO, Emperor

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1979

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