Seiko Cal. 7137 - 643

The 7137-643 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7137 caliber with 30j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-0144efde79c1]

Also known as: Bullhead, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

9.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Black

Jewels

30j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1977

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