Seiko Cal. 6187 - 912

Released in 1978, the Cal. 6187 with design code 912 was part of Seiko's domestic market collection. The Inner Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-fc5ef3f59dd4]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1978

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