Seiko Cal. 5660 - 438

This Automatic model from 1965 features a 35mm Two-Tone case. Powered by the 5660 caliber with 21j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-944cc94d4a7b]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

35mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1965

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