Seiko Cal. 4540 - 873

The Seiko 4540-873 represents an important milestone in Seiko's 1972 lineup. Powered by the 4540 caliber with 22j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-5046677873b3]

Also known as: Monster, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1972

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