Seiko Cal. 6641 - 553

The Seiko 6641-553 represents an important milestone in Seiko's 1974 lineup. Powered by the 6641 caliber with 17j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-5dd54011183b]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

17j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1974

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