In-depth study of 60A - Type I (according to Suarnet): An important collection focusing on n°60 type I, rich in remarkable varieties, both on single stamps and on letters. These include: large break, dove with outstretched wings, indentations, white spots, broken, broken or doubled frame, moon-shaped ring, deformed upper fillets and other notable anomalies. A complete set of great philatelic interest. Expert: Mr. Louis-Edouard BEHR