Stamp expertise
Find Your Stamps Value
A professional stamp expert and an appraisal site. People can search for the value of their stamps, with links to dealers, thru their database
A professional stamp expert and an appraisal site. People can search for the value of their stamps, with links to dealers, thru their database
Grupo Afinsa
One of Spain's largest investment companies in the tangible assets area and professional stamp experts (collectibles such as stamps, coins, art and antiques)
One of Spain's largest investment companies in the tangible assets area and professional stamp experts (collectibles such as stamps, coins, art and antiques)
Maison Williame
The oldest philatelic auction house in Belgium, they also are, professional stamp experts in appraisals of Belgian colonial stamp issues
The oldest philatelic auction house in Belgium, they also are, professional stamp experts in appraisals of Belgian colonial stamp issues
PSE Professional Stamps Expert
Site representing a company of professional stamp experts providing value-added grading and authentification services on US postage stamps
Site representing a company of professional stamp experts providing value-added grading and authentification services on US postage stamps
WADP Numbering System (WNS)
Site developed by the Universal Postal Union (UPU) and the World Association for the Development of Philately (WADP) to create a database of all authentic stamps issued by UPU member countries
Site developed by the Universal Postal Union (UPU) and the World Association for the Development of Philately (WADP) to create a database of all authentic stamps issued by UPU member countries