Seiko Cal. 5660 - 141

The 5660-141 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5660 caliber with 18j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-91765d7d59a4]

Also known as: Helmet, Navigator

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1965

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