Seiko Cal. 3867 - 657

The 3867-657 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3867 caliber with 34j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-634d22964aab]

Also known as: UFO, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1978

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