Seiko Cal. 7031 - 503

This Spring Drive model from 1966 features a 41mm PVD Black case. Powered by the 7031 caliber with 27j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-18a0f6e9d175]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Cream

Jewels

27j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1966

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