Seiko Cal. 5660 - 931

This Automatic model from 1980 features a 45mm PVD Black case. Powered by the 5660 caliber with 21j jewels beating at 28,800 bph, it delivers a 62 hours power reserve. [seikata-wm-817bfea07194]

Also known as: UFO, Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

21j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1980

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