Seiko Cal. 6643 - 240

Released in 1973, the Cal. 6643 with design code 240 was part of Seiko's domestic market collection. With its 19mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-ef321fe0cc4f]

Also known as: Monster, Panda

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

44mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1973

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