Seiko Cal. 6620 - 640

The Seiko 6620-640 represents an important milestone in Seiko's 1998 lineup. Powered by the 6620 caliber with 22j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-19383468e7d7]

Also known as: Silverwave, Emperor

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Champagne

Jewels

22j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1998

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