Seiko Cal. 5645 - 683

The Seiko 5645-683 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-229a2173a725]

Also known as: UFO, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1979

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