Seiko Cal. 6663 - 434

This Spring Drive model from 1977 features a 44mm PVD Black case. Powered by the 6663 caliber with 20j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-334d7d6928f7]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1977

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