Seiko Cal. 0740 - 423

The Seiko 0740-423 represents an important milestone in Seiko's 1969 lineup. The Fixed bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-2b3fdbf0cd4d]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

120m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1969

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