Seiko Cal. 6640 - 266

Released in 1983, the Cal. 6640 with design code 266 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-95ace36894fa]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1983

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