Seiko Cal. 6641 - 398

The 6641-398 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6641 caliber with 21j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-bea7218e8177]

Also known as: UFO, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1998

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