Seiko Cal. 6686 - 781

This Spring Drive model from 1978 features a 44mm PVD Black case. Powered by the 6686 caliber with 36j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-d42468dc43dc]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Silver

Jewels

36j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1978

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