Seiko Cal. 4542 - 690

The Seiko 4542-690 represents an important milestone in Seiko's 1986 lineup. Powered by the 4542 caliber with 20j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-204bddf5ff49]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

12.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

20j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1986

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