1948 - 1990. Mainly mint never hinged collection, unused only some early values. In the main numbers mint never hinged from no. 71 complete. Before that still with good mint never hinged issues like black overprint with certificate Schlegel (\"genuine. Perfect\"), no. 61-67 mint never hinged expertized Schlegel BPP as well unused no. 35-60 and no. 68-70. Perfect to the continue suited.