Seiko Cal. 6180 - 731

The 6180-731 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6180 caliber with 21j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-230c1f9fcb32]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1967

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