Seiko Cal. 6663 - 192

This Spring Drive model from 1971 features a 36mm PVD Black case. It features a Green dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-a651fe5234c0]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

33j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1971

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