Seiko Cal. 5687 - 237

The Seiko 5687-237 represents an important milestone in Seiko's 1968 lineup. Powered by the 5687 caliber with 35j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-a753803ba9b9]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Titanium

Case Width

38mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1968

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