Seiko Cal. 5678 - 991

Released in 1982, the Cal. 5678 with design code 991 was part of Seiko's domestic market collection. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-ba0ab4988947]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1982

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