Rhodesian Eisteddfod medal

This is one of my gems in my collection. This Rhodesian Eisteddfod medal by were made in 1928 by Turner & Simpson, Birmingham. It was never issued but is engraved 19
Contralto open. Got a few questions about it. Would it have been made for Rhodesia in Birmingham, the name don’t seems to be places on afterwards. Will there be any way to find out how many were made, it seems like it may be rare? Does the fact that it is not issued make it rarer and more collectible? Any information will be welcome.
Rho front.jpg
Rho marks.jpg
Rho back.jpg

I can’t answer all your questions but I can say with reasonable certainty that it would have been mass-produced in Birmingham and then shipped out to Rhodesia.