Seiko Cal. 3864 - 364

This Automatic model from 1976 features a 40mm Gold-Plated case. Powered by the 3864 caliber with 21j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-235d4f8b163c]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

21j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1976

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