Seiko Cal. 7186 - 643

The Seiko 7186-643 represents an important milestone in Seiko's 1972 lineup. Powered by the 7186 caliber with 30j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-4019848c78d3]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1972

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