UNIVERSAL POSTAL UNION / FRANCE 1906
A French Essay for a Letter Card with attached Paid Reply Envelope (corner missing), printed in blue on green, the French ‘Sower’ stamps with value blocked out, both halves overprinted “SPECIMEN”. This Essay was submitted to the 1906 U.P.U. Conference in Rome as a proposal for an International Reply Letter Card valid in all U.P.U. member countries. One example was present to each delegate at Rome.
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