WWPCM:  "Litografia Maia"
               Portugal, since 06.12.1926
                    http://www.litomaia.com/   
1926

1969
1974
1992
 		 "Rodrigo F. dos Santos & Cª":
adress 1: Rua de Camões, nº250 Porto
adress 2: Rua Dr. Alfredo De Magalhaes 46, Porto, Portugal
"Litografia Maia - Industrias Graficas Rodrigo F. dos Santos,SA"
adress 3: Rua Henrique Bravo, Nº7206, 4465-165 S.Mamede Infesta
Telefone: 351 229 021 344; Fax: 351 229 021 189; geral@litomaia.com

First equipments of the company in 1926:

printing machine litho stone

Licence to print cards was bought from a company called "Germano&Ca" (was founded in 1881) in Lisbon.
The main patterns came from "Germano&Ca".

Thanks Rodrigo Maia for information!