Seiko Cal. 6663 - 918

Released in 1967, the Cal. 6663 with design code 918 was part of Seiko's domestic market collection. With its 22mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-367cb98bb43a]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Cream

Jewels

19j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1967

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