Letter | Description | Signature | Date |
---|---|---|---|
|
Willy Urfer
>
Ricordi
Winterthur, Svizzera Source: Archivio Storico Ricordi |
LLET029153 > | 30/12/1948 |
|
Luigi Bai
>
Willy Urfer
Milano Source: Archivio Storico Ricordi |
LLET029154 > | 17/1/1949 |