How do I identify Subaru calipers and brackets?

I have this two-pot caliper that I think is from an '04 Outback but I'm not really sure. I don't see any Subaru part numbers cast into the bracket or caliper, just casting numbers. Is there a guide to ID'ing Subaru brakes, or some other surefire way to get a list of applications for a caliper I physically possess but have no other info on?