Seiko Cal. 3861 - 766

The Seiko 3861-766 represents an important milestone in Seiko's 1966 lineup. Powered by the 3861 caliber with 22j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-0667091dad7a]

Also known as: Rally, World Timer

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1966

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