Seiko Cal. 6660 - 760

This Spring Drive model from 1970 features a 39mm Titanium case. Powered by the 6660 caliber with 33j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-665384fe2e97]

Also known as: Helmet, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1970

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