Seiko Cal. 6640 - 207

The 6640-207 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6640 caliber with 33j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-b753bc89cb7f]

Also known as: Sea Horse, Flighty

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

33j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1992

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