Thank you, senior member!
I have taken some more detailed pictures, but unfortunately can not find any more markings than the one beside the barrell.
M.P-V.D.A.-VII -45 , 196/1966
You can also see on the picture of the shaft a carving of the number 413.
I really hope someone are able to recognize this item and it`s history.
Thank you again for giving me your time and effort regarding this matter.