Seiko Cal. 6645 - 668

Released in 1977, the Cal. 6645 with design code 668 was part of Seiko's domestic market collection. With its 22mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-ddb95903eb3a]

Also known as: Silverwave

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1977

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