Philatelic Supplies lists these items for Slovakia
Slovakia 1999 B. (3v shtlt) MS325: Bearded Reeding; Redstart; Red-backed Shrike 2.90
Slovakia 2015 Nature (2v sheetlet): Black Stork & Otter 3.90
Slovakia 2015 Ludorit Stur (1v): bird of prey 4.50
Slovakia 2016 Johannes Jessenius & Owl label(1v): 2.95
List dated Nov 2017
Prices in GB Pounds

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