Brass keys on red tag with carabiner

I lost my brass house keys yesterday around 3pm in Helena. They were on a sturdy black carabiner, about 3 inches long, with a bright red plastic tag that reads 'A-12'. The keys include a vintage Yale key and a couple of modern house keys, plus a small silver dog tag engraved with my initials 'PP'. I had been walking near the Capitol building on Last Chance Gulch, then stopped by a coffee shop on Main Street and must have dropped them outside. The set is a bit scratched from daily use, and those keys unlock my apartment and mailbox—really need them back.