Seiko Cal. 5687 - 938

The 5687-938 is a sought-after Solar piece from Seiko's golden era. Powered by the 5687 caliber with 31j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-ccdb0151a9ae]

Also known as: Bullhead, Helmet

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1995

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