I was fooled before by a “door” in Darwin, so I’m pretty skeptical of this one in Melbourne. At the old Melbourne Mint there’s a precious-metals brokerage called, well, Melbourne Mint http://www.melbournemint.com.au which includes a door that does not look at all like anything else we’ve seen. Here are a few images:

It certainly does not look right; it seems too large to be an emergency door, too small for a main door (and suspiciously far off the floor), and way too shiny. It’s just too bad they don’t show off a real one.