Seiko Cal. 5687 - 422

Released in 1979, the Cal. 5687 with design code 422 was part of Seiko's domestic market collection. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-df0573877aff]

Also known as: Bullhead, Helmet

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1979

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