Seiko Cal. 6660 - 663

The Seiko 6660-663 represents an important milestone in Seiko's 1986 lineup. With its 21mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-2781afb7ad6d]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1986

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