Seiko Cal. 6641 - 290

The 6641-290 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6641 caliber with 32j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-1f1165e06dd2]

Also known as: Silverwave, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

34mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1975

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