Seiko Cal. 6640 - 592

The 6640-592 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6640 caliber with 25j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-925dc5be77ba]

Also known as: Flighty

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

25j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1972

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