this one say's it's in 32 caliber ( which could easily be wrong ) but offers up several pictures...
I was thinking they worked similarly to a revolver, & this guy kinda looks like that ( but I'll admit, I have no real idea or experience, only looking at the pics )
http://www.gunbroker.com/Auction/Vie...Item=365571661
this one also say's it's chamber in 32 Rim Fire "extra short" but looking at the design, I'd think it could rather easily be chambered for 22 short... but the formidable starting prices on both these guns would keep me from wanting to play with it... ( actually again, just looking at the pictures, the drum looks like it could easily be machined from modern tool steel, & possibly even have room to chamber 32 acp or 32 S&W short ??? )
http://www.gunbroker.com/Auction/Vie...Item=366024080