Seiko Cal. 0740 - 813

This Spring Drive model from 1973 features a 44mm Titanium case. Powered by the 0740 caliber with 27j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-38f8ac04af8a]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Cream

Jewels

27j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1973

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