Low value definitives (original dark colours) Low value definitives (pale colours) Low value definitives (changed colours) High value definitives (original square format) High value definitives (rectangular format) 1951 Coronation 1937 Centenery of the postage stamp 1940 Victory 1946 Silver wedding 1948 Olympic games 1948 Universal Postal Union (UPU) 1949 Festival of Britain 1951
This worldwide list gives you the names and areas of specialisation of about 1 820³ individual stamp experts, past and present, who have back stamped or hand signed postagestamps, or issued certificates.
The purpose of this list of philatelic experts is to aid collectors in their judgment of the genuineness of postagestamps.
The dealers' name stamps may be either honoured marks of "guarantee" – in case a refund would be subsequently requested – or plain advertisements.