Seiko Cal. 6663 - 326

The Seiko 6663-326 represents an important milestone in Seiko's 1978 lineup. It features a Blue Sunburst dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-73aaabef9d2d]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1978

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