1850, extensive special collection the 1. Issue, used and on pieces (in addition to it a few documents), with numerous special feature, like colours, double sided prints, margin copies, silk papers, offsets, plate flaw, better cancellations, some with audit results, as well always 50 pieces no. 1 and 2, in total over 650 stamps, in addition to it 39 blue Merkure (former starting price 4000)