Update: April 2021
| Page | Perfin | Remark |
| 33 | AZ | Also: Holland-Marocco Handelsvereeniging, Prins Hendrikkade 148, Amsterdam. Cancellation Amsterdam, 11/27/1915.
|
| 77 | FC | There are two variations of the perfin FC made by two different perforators. The perfin FC in the catalog becomes perfin FC 1; the second variation with larger holes and slightly larger width becomes perfin FC 2.
|
| 95 | H 8 | Newly found perfin H with strange shape (see PP 131).
|
| 105 | HP 2 | The address Goirleseweg 20 should be: Bergstraat 50, Goirle. |
| 117 | IML |
IML does not exist; it is a part of THL. |
| 146 | LS 1 | Also: Swiss Society of Life Insurance and Annuity in Zurich, Heerengracht 124-128, later Heerengracht 514 in Amsterdam. Cancellation 30 July 1927.
|
| 202 | NGB | Perfin NGB also found in postcard G90 (Geuzendam)
|
| 257 | S&C 4 | S&C 4 does not exist; it’s S&CR |
| 278 | VG 2 | Newly found perfin V.G. The dot stamp is unfortunately illegible. The perfin has 9. 12. holes and a height of 6 mm.  |
| 297 | WP | After investigation, this perfin does not exist. See the article from Perfinpost 126: The perfin WP is canceled. |
| 305 | Ster 4 | Newly found Michelius perforation, which will be included in a next edition of the catalog as ‘Star 4’. The perfin has 12 holes and a height of 10 mm. The user is unknown.
|
| 310 | JM 2 | Newly found perfin JM from the Dutch East Indies in NVPH No. 8. The stamp was used between 1870 and 1888 with stamp 3 from Soerabaija.  |
| 323 | AD | Also found in sales tax stamps, in particular in o A0.06 and o A1.20 |
| 326 | ES 1 | Also found in sales tax stamp, especially in o A0.90
|
| 335 | RM&Z | New perfin RM&Z in adhesive stamp pl 298, 10 cents, used on 16 May 1928. User: banker R. Mees and Zoonen in Rotterdam. The perfin consists of 13, 19, 12 10 holes and is 7 mm high. The holes in the image are made black. |
| 338 | VB 4 | Also found in tax stamp, in particular in pl 298. |
| 339 | VDS | Also found in tax stamp, in particular in pl 299 |
| 341 | HSBC | Perfin of Ned. Indies, also found in tax stamp, in particular in pl 10 ct. |
| 348 | CM 2 | New German perfin found in nr. 35: CM by C. Mebus, Wermelkirchen.
|
| 348 | Retort | Known in German seal, Deutsches Reich mi 159
|
