Seiko Cal. 0731 - 903

This Quartz model from 1966 features a 39mm Stainless Steel case. Powered by the 0731 caliber with 20j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-7594b0649c39]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

70m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1966

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