| Benussi, Ruggero (AIEP (Association internationale des experts en philatélie)) |
Attest |
Sassone |
20 |
| APS, (American Philatelic Society) (Prüferkommission) |
Attest |
Scott |
26 |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Sassone |
6 |
| Caffaz, Egidio (APFIP (Associazione Periti Filatelici Italiani Professioni.)) |
Attest |
Sassone |
63 gab |
| Bach, Jean-Paul, und Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) |
Attest |
Sassone |
7 |
| Avi, Helmuth (SBPV / ASEP (Schweizerischer Briefmarken-Prüfer-Verband)) |
Attest |
Sassone |
BF 12 |
| Bolaffi, Giulio (Sonstiges) |
Attest |
Scott |
C 1 - C 10 |
| Giordani, Giancarlo (Sonstiges) |
Attest |
Sassone |
S 5 |
