Seiko Cal. 3865 - 120

The Seiko 3865-120 represents an important milestone in Seiko's 1978 lineup. Powered by the 3865 caliber with 27j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-79702ec57cd1]

Also known as: Rally, World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

27j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1978

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