[1] La Suisse Horlogère, 1952, 2, p. 51
[2] FOSC 1883
[3] FOSC 1904
[4] FOSC 1916
[5] FOSC 1937
[6| For more information on the subject, see Joël Pynson, La montre-bracelet Suisse, 2004, Éditions Time To Tell, p.102
[7] FOSC 1958
[8] FOSC 1963 and 1970
The FOSC (Feuille Officielle Suisse du Commerce) is available on E-periodica
Notes :
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