Seiko Cal. 5657 - 120

This Spring Drive model from 1967 features a 41mm Two-Tone case. Powered by the 5657 caliber with 36j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-caaf4ae24bc1]

Also known as: Tuna, Rally

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1967

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