https://www.arithmeum.uni-bonn.de/sammlungen/rechnen-einst/objekt.html?tx_arithinventory%5Bobject%5D=3958&L=0
Marchant 8 EFA "Figuremaster"
marchantefa
https://www.figuremaster.net/
3D PRINT | FIGUREMASTER | 3D MODEL | STL FILE | 3D PRINT MODEL | 3D PRINTER
stl fileprintmodel
https://www.arithmeum.uni-bonn.de/en/collection/calculating-in-olden-times/object.html?tx_arithinventory%5Bobject%5D=103&L=2
Marchant 10 FA "Figuremaster"
marchantfa