Phone card in Scarborough, ON

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  Keystone Manufacturing (Plastics) Ltd.
  (416) 293-3842

  15 Golden Gate Crt., M1P 3A4  Scarborough

  Keystone's early operations, begun in 1958, made specialty plastics items (tent signs, calculators etc). Its first plastic cards was manufactured for a current competitor, without realizing the potential then. But in 1984, under new ownership, Keystone launched into the card manufacturing busines…