Free Online Stamp Catalogue with Wiki information about almost every stamp. This is more than just a Free Online Stamp Catalogue. (FR) Catalogue Online Gratuit de Timbre. (NL) Gratis Online Postzegel Catalogus.
A. Doms
Broux Guillaume
De Schutter P.P.G.
Dokter W. Molly
Enschedé en Zonen (Haarlem)
Frans Poortman
J. De Bast
J. Malvaux
L. Janssens
Leon Janssens
Malvaux
Slania Czeslaw
Wiener