I am not sure, but I believe it was just a commemorative badge, one of those that the Soviets used to wear to show their support of their beloved lieders.
No slogans, no signifying markings, no mint mark on the screw plate, no idea really. Even if there is some kind of mint mark under the screw plate on the back, all I'll be able to tell you is who made it. It's brass so I'd say late 40s through early 60s. Other than that, it seems rather generic. The shape sort of reminds me of some ВЛКСМ badges, but they always had their name somewhere. Sorry.
Phillip
I'm not sure about this, but the badge has a certain "look/feel" to it. I think it may be a "death" badge. As Stalin died in '53, the badge certainly fits into that period. My guess, anyway... nice badge.
"We are Marching for the Victory of Communist Labour" V.I. Ulyanov (Lenin)
All it says is: "Badge with depiction of Stalin - 1940s; brass, enamel, screw (back)." Oh, and some outrageous price that no one in his or her right mind would pay.
Phillip