Description
Pfenniger, F., Report on the Spittal letter of 20 February 1839 with stamp (!) and report on the Peuerbach letter of 1841, 2 articles with illustrations, Collegium Philatelicum, Issue 31, 1964 #42062
Pfenniger, F., Report on the Spittal letter of 20 February 1839 with stamp (!) and report on the Peuerbach letter of 1841, 2 articles with illustrations, Collegium Philatelicum, Issue 31, 1964 #42062