Seiko Cal. 6640 - 174

Released in 1986, the Cal. 6640 with design code 174 was part of Seiko's domestic market collection. The Fixed bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-31cd73dc6213]

Also known as: Sumo, World Timer

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

70m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1986

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