Seiko Cal. 5660 - 661

This Spring Drive model from 1968 features a 40mm Two-Tone case. It features a Cream dial protected by a Acrylic crystal and offers 30m of water resistance. [seikata-wm-51a4c255cb62]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

30m

Dial Color

Cream

Jewels

22j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1968

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