Seiko Cal. 3860 - 550

The 3860-550 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3860 caliber with 27j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-a2b8fb65b906]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1966

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