The presented object is a double-piston vacuum pump. Its mechanism is concealed in a polished wood case set on a wooden table (not original).
The Jagiellonian University Museum Collegium Maius
Inventory number: 18044; 2350/V
Creator: Jean Nicolas Fortin (1750–1831)
Time of creation: 1789
Place of creation: Paris
https://muzea.malopolska.pl/en/objects-list/2753
Digitalisation: RDW MIC