Seiko Cal. 3861 - 173

The 3861-173 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3861 caliber with 33j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-6d3f8c45cbbf]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1966

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