Seiko Cal. 6640 - 699

The 6640-699 is a sought-after Solar piece from Seiko's golden era. Powered by the 6640 caliber with 26j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-bc3014ddb956]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

130m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1966

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