Cincinnati Industrial Expositon medal

This is a medal, found at Canary Wharf, London, during its construction. After some research online, it seems to be an bronze award for a science fair?

I’ve found a silver version of this medal on eBay for £300~. I’ve also found sites where they’ve sold the bronze version at auction.

The only difference is those medals had detail on the reverse side of the medal, but this one doesn’t have anything on the back (I’m told this is because it was stuck to a wall).

I’d appreciate some help in valuing this. Thanks.

Poor