Seiko Cal. 3880 - 364

This Spring Drive model from 1968 features a 39mm Two-Tone case. With its 20mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-40fe4e7e70b5]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1968

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