Vintage Diana Model No. 5

Hello everyone,
I was on the international air gun forum and I posted the below pictures and questions. A guy named Redfeather suggested that I post it here as well.


Hello everyone,
I am new to this forum. After a lot of searching on the web this looked liked the best place to ask some questions. I was cleaning out my mothers house and came across a Diana Air Pistol Model No.5 It turns out my grandfather left it to me when he passed but my mother didn't like guns and forgot about it... That was about 20 years ago. Any how, the pistol looks to be in perfect condition. The box is mint, it has all the paper work / paper targets and even the price and something in I think German is still written in pencil on the outside ($16.95 usd). The wood handle is beautiful, the gun cocks, and fires but there appears to be a pellet lodged in the barrel.

Does anyone have any recommendations as to how to remove the pellet? Should I bring it to a gunsmith and have them give it a try? Can I purchase a replacement barrel for it and if so should I since the pistol is all original right now? Any advise would be appreciated. I would love to get this pistol back into working order and be able to fire again. I have some pretty good memories of shooting it with my grandfather when I visited his house and it would be great to be able to use it again.