Seiko Cal. 3866 - 138

The 3866-138 is a sought-after Automatic piece from Seiko's golden era. With its 19mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-1c94a732c3ed]

Also known as: Tuna, Emperor

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1967

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