Seiko Cal. 4542 - 230

This Spring Drive model from 1971 features a 42mm Two-Tone case. Powered by the 4542 caliber with 23j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-3e0bc31fe5c8]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1971

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