22 Drum mag info

[GAIRLOCHIAN]

I got this steel drum mag in a deal and have no idea what rifle it will fit.
It is 133mm in diameter with no markings anywhere.
Steel construction with black plastic mag follower.
Any info appreciated.Also value needed.

 

[StrelokM38]

That's off a Pietta PPS50 I believe.

 

[SHELL SHUCKER]

Yep, looks like a PPS 50 mag to me.
https://www.wolverinesupplies.com/images/items/Fullsize/PIEPPS5050DRUM.jpg?t=636314329331278157

 

[GAIRLOCHIAN]

Thanks for the info