Non Silver Reed&Barton Race Car Bank

Hi there!

I’m not really a silver collector, but I have a question about an odd collectable that I’ve found. It’s odd in that it’s not silver at all. I found a Reed&Barton race car bank that’s plated in what appears to be bronze. I can find no other example of this item with this plating anywhere else on the internet. Everything I find is plain as day silver. Can someone tell me if I’ve found an oddity or if my google search just isn’t as almighty as I’d like it to be