Sprache:
Adams Musical Instruments - Together in Music

Seriennummer - William Frank Company

Serial Number Year Manufactured
Excelsior or Frank
6600 - 10,000 19?? - 1938
Excelsior and American Prep
1000 - ?? 1942 - 1945
Frank
10,000 - 15,000 1945 --
American Prep
100,000 - 112,000 1945 --
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