Seiko Cal. 3865 - 721

The Seiko 3865-721 represents an important milestone in Seiko's 1976 lineup. With its 21mm lug width and 13.8mm profile, it sits comfortably on most wrists. [seikata-wm-8be899081fda]

Also known as: Rally

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Champagne

Jewels

35j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1976

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