1874/1921 (ca.) used/mint never hinged and unused group of Serbia and Montenegro, starting with first issues, incl. many varieties, perforation and paper types, colours, etc., incl. Montenegro with a stockbook of hundreds of values of Mi.-Nr. 21, 73 and 1921 set of unissued values, also a stockbook of Serbia with many noted and described forgeries, etc., in seven stockbooks
