The year 2014 marked the 50th anniversary of the first year of operation of the Germany & Colonies Philatelic Society following the amalgamation of the Germany & Colonies Stamp Club (established 1947) and the Stockton German Study Group (1960).
The G&CPS celebrated its inaugural year in 1964 with the first Germania Posta philatelic exhibition held in Stockton.
DDR.....Philatelic Exchange Labels (Green) 'Tauschsendung'
I am looking for a reference book or more information as to the different letters before the numerals.
