Seiko Cal. 6645 - 940

The Seiko 6645-940 represents an important milestone in Seiko's 1990 lineup. Powered by the 6645 caliber with 32j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-97b238ea58c6]

Also known as: Tuna, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1990

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