Seiko Cal. 4542 - 681

The Seiko 4542-681 represents an important milestone in Seiko's 1976 lineup. Powered by the 4542 caliber with 26j jewels beating at 28,800 bph, it delivers a 55 hours power reserve. [seikata-wm-d53369433250]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Navy

Jewels

26j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1976

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