Seiko Cal. 6664 - 646

The Seiko 6664-646 represents an important milestone in Seiko's 1968 lineup. With its 21mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-5d176e426ddd]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1968

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