Seiko Cal. 5656 - 542

The Seiko 5656-542 represents an important milestone in Seiko's 1980 lineup. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-1ddf9ea6e7e4]

Also known as: Helmet, Bellmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1980

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