Seiko Cal. 5660 - 377

This Spring Drive model from 1969 features a 35mm Hardlex-Coated Steel case. It features a White dial protected by a Acrylic crystal and offers 170m of water resistance. [seikata-wm-23b5c53f41db]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1969

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