| Prüfer | Art der Urkunde | Katalog | KatalogNr. |
|---|
| Eichele, Martin (BPB (Briefmarkenprüfstelle Basel)) | Attest | NVPH | 101 B |
| Louis, Albert (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 3 c |
| Louis, Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 1 d |
| Louis, Albert (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 2 |
| Louis, Albert (BPP (Bund Philatelistischer Prüfer)) | Befund | NVPH | 2 g |
| Moeijes, W. (Sonstiges) | Attest | NVPH | 2; 3 |
| Moeijes, W. (Sonstiges) | Attest | NVPH | 30 a AI |
| Muis, C. (Händlergarantien) | Attest | NVPH | 1 j |
| Muis, C. (Händlergarantien) | Attest | NVPH | 5 |
| Muis, C. (Händlergarantien) | Attest | NVPH | 25 H |
| Muis, C. (Händlergarantien) | Attest | NVPH | 30 - 33 |
| Muis, C. (Händlergarantien) | Attest | NVPH | Port 91 |
| Nederlandsche Vereeniging, van Postzegelhandelaren (Händlergarantien) | Attest | NVPH | 1 d |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Kurzbefund | NVPH | 1 b I |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 1 j III |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 12 I A |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 24 L |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 25 H |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 30 F II; 32 ; 33 F |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 45 B |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 61 c |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | 149 - 162 |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Attest | NVPH | V 402; V 403 P |
| Vleeming, Henk (AIEP (Association internationale des experts en philatélie)) | Kurzbefund | NVPH | 351 - 361 |
| Vleeming, Henk (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 1 a I |
| Vleeming, Henk (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 2 a I |
| Vleeming, Henk (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 3 a I |
| Vleeming, Henk (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 3 c |
| Vleeming, Henk (BPP (Bund Philatelistischer Prüfer)) | Attest | NVPH | 3 c |
| de Veer, G.W.A. (KNBF (Nederlandse Bond van Filatelistenverenigingen)) | Attest | NVPH | 35 |
| van Balen Blanken, G. C. (Sonstiges) | Attest | NVPH | 2 c |
| van Balen Blanken, G. C. (Sonstiges) | Attest | NVPH | 2 c |
| van Beekum, F. (KNBF (Nederlandse Bond van Filatelistenverenigingen)) | Attest | NVPH | 1 a |
