https://www.arithmeum.uni-bonn.de/en/collection/calculating-in-olden-times/object.html?tx_arithinventory%5Bobject%5D=1655&L=2
Badenia TAVZL 17
badenia
https://www.arithmeum.uni-bonn.de/sammlungen/rechnen-einst/objekt.html?tx_arithinventory%5Bobject%5D=1655&L=0
Badenia TAVZL 17
badenia