Seiko Cal. 5656 - 187

The Seiko 5656-187 represents an important milestone in Seiko's 1978 lineup. Powered by the 5656 caliber with 25j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-f98499472d97]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

36mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1978

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