#1990-1997 Hungary - Cent. of Hungarian State Institute of Geology (MNH)
1969 Centenary of the Hungarian State Institute of Geology, Set of 8. Designs: 40f, Fossilized zelkova leaves. 60f, Greenockite calcite sphalerite crystals. 1fo, Fossilized fish, Clupea hungarica. 1.20fo, Quartz crystals. 2fo, Ammonite. 3fo, Copper. 4fo, Fossilized turtle, Placochelys placodonta. 5fo, Cuprite crystals.