See also: Seeland
[1] http://www.judaisme-alsalor.fr/synagog/hautrhin/g-p/hegenh/horloge/tpicard.htm
[2] FOSC 1892
[3] FOSC 1895
[4] FOSC 1904
[5] Patent CH 44 390
[6] Patent CH 50 388
[7] Revue Internationale de l'Horlogerie, 1907, 18, pp. 967-968
[8] FOSC 1915
[9] FOSC 1916
[10] FOSC 1928-1929
[11] FOSC 1960
[12] Europa Star, 1970, 64, 4/6, p. 68
[13] FOSC 1967
[14] Chicago Tribune, Chicago, Illinois, Sun, Mar 31, 1968, p. 99 https://www.newspapers.com/article/chicago-tribune-invicta-watch-co-to-mak/103616824/
[15] Journal Suisse d'Horlogerie, 1969, 1, p. 6
[16] Europa Star, 1979, 116-2, p. 6
[17] FOSC 1983
[18] FOSC 1991
[19] FOSC 2007
The archives of Fédération Horlogère, Davoine and l'Impartial are available online at www.doc.rero.ch
The archives of Journal Suisse d'Horlogerie, Europa Star, Revue Internationale d'Horlogerie and Suisse Horlogère are available at The Watch Library
The FOSC (Feuille Officielle Suisse du Commerce) is available on E-periodica
Notes :
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