The URL http://www.perseus.tufts.edu/hopper/artifact?name=Boston%201982.283&object=Coin brings up information about a mirror formed from two coins of a type issued for Antinous.
The object is in the MFA's collection and you can see further information at http://mfa.org/collections/search_art.asp?recview=true&id=155289. That URL isn't published by the MFA and some time ago I pointed out that this situation is unfortunate. It's now becoming unfortunate that the MFA website hasn't been updated to display nice, simple URLs for the records in its curatorial database. Something along the lines of JSTOR's stable urls (e.g., http://www.jstor.org/stable/876505).
When it does, Perseus will be able to include markup along the lines of <link rel="alternate owl:sameAs" href="http://mfa.org/collections/search_art.asp?recview=true&id=155289"> in the header of its page. That will be progress.