Unfortunately for my private purpuses they are much too young
a dating between 1375-1400 would much more suite my wishes - but that's live
I just received the calibres of the three barrels from the museum which are: 6, 5 and 3 cm. Unforutnately they only informed then in bulk without specifying for which barrels. I guess I have to visit the museum again and take the measurements by myself.