| Location | Slovakia |
| Year | 2020 |
| Type | Collection medallions/Mint set tokens |
| Composition | Copper-aluminium-nickel (Cu92Al6Ni2) |
| Weight | 6.35 g |
| Diameter | 26.10 mm |
| Thickness | 1.75 mm |
| Shape | Round |
| Technique | Milled |
| Orientation | Medal alignment ↑↑ |
| Edge | Plain |
| Period | Republic (1993-date) |
| Notice | |
| Reference(s) |
| Obverse description | Portrait of Jozef Maximilián Petzval. His birth and death years: 1807–1891 |
| Obverse lettering | JOZEF MAXMILIÁN PETZVAL 1807 - 1891 |
| Obverse script | Latin |
| Reverse description | Petzval portrait lens, camera that revolutionized 19th-century photography. |
| Reverse lettering | SVETOVÉ VYNÁLEZY
2020 (Translation: World Inventions.) |
| Reverse script | Latin |
| Engraver | (MK) Kremnica, Slovakia(1328-date) |
| Mintage | 2020 MK - In set - 2 000 |
| Catalog ID | 7681417680 |
| Comments |
