Seiko Cal. 6656 - 723

This Solar model from 1977 features a 36mm PVD Black case. With its 20mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-eef9dddb0088]

Also known as: UFO, Arnie

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Silver

Jewels

19j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1977

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