Seiko Cal. 6668 - 241

This Hand-Winding model from 1978 features a 37mm Hardlex-Coated Steel case. Powered by the 6668 caliber with 20j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-3547890849a7]

Also known as: Helmet, World Timer

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1978

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