yeah it seem that someone already makes a similar gonne , but what I can see from the photos it doest have the engraved writing on it . if I could find some kind of contact info I would contact him .
I just got a reply from the historical museum in stockholm and those pictures .
the weight is 945 gram
I havent got the exact words of the writing yet , but they claim that its a missunderstood or contaminated phrase from the ave maria pray , in german and latin . the writing is only at the upper 3 surfaces of the gonne .
I will try to have better photos and the exact writing .
maybe even ask them if I could borrow the original to produce an identical copy ,
but that will probably be difficult . they will of course not let it leave the museum ,
but maybe if I do it in the museum .