Seiko Cal. 3861 - 507

This Spring Drive model from 1974 features a 34mm Two-Tone case. Powered by the 3861 caliber with 30j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-7a6cba1ab4d2]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1974

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