Seiko Cal. 7140 - 428

The Seiko 7140-428 represents an important milestone in Seiko's 1965 lineup. Powered by the 7140 caliber with 21j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-29de74132c45]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1965

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