#4283-4284 Hungary - 2013 Treasures of Hungarian Museums II, Set of 2 (MNH)
2013 Treasures of Hungarian Museums, Set of 2 stamps. Items in Hungarian Museums: Designs: 250fo, Calcite crystals, Calcite Crystal Museum, Fertőrákos (World Heritage Site). 400fo, Lamps, Lamp Museum, Zsámbék.
The designs, when viewed through red and blue glasses, become three-dimensional