I too would like to know. I am guessing someone was creative.

Basin Custom has done custom metal projects for people. This looks like something we would be able to make! Contact us for more information. www.info@basincustom.com

Thank you so much for your interest in my work. I know it’s been awhile since you posted this question, and for that I apologize. As you can imagine, I get quite a few questions on Houzz; I’m afraid this one just got away from me. If you are still interested in learning the answer to your question please let me know and I will do my best to find it for you.

Best of luck with all your projects!

You should try modernhousenumbers.com. I just ordered numbers from there and they are beautiful. They also offer plaques and do custom work. Very reasonably priced too!