Seiko Cal. 5661 - 317

This Hand-Winding model from 1975 features a 35mm Hardlex-Coated Steel case. With its 18mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-a28c4f4fe647]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

33j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1975

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