I Googled 204R Pittsburgh and found that the 204th artillery regiment mustered out of Pittsburgh. On rare occasion (maybe 2 or 3 items a year) I find CW attributed items in my area. This is sort of wishful thinking, but could this tag be associated with this CW Regiment? The center of the star looks like it had something soldered to it at one point, different type of brass.
I don't see a Connection between the Upside Down Pentagram & the Military,
It's a Pretty High Number for Much Else though.
However My guess Something Oval was definitely Soldered in there.
Perhaps a Business Name,.
I'd definitely Doubt the Tool Tag idea Because of the sign, even if Baphomet is not the intention
of the Symbol in this case.. And because of the R
A Person may have 204 Tools Hanging in a Shop.
But
204 A's,
204 B's Etc to the point through the alphabet of needing a
204 R Tool ?
I Think Cow, Dog or other animal Tag would be out Also.
again the Star & the R are Probably important.
of course the star could be from the manufacturer
Pickers Tag/Token just came to Mind.
What Grows on a Farm that Starts with R That someone may have Picked 204 of
in a day ? besides Rats & Rabbits LOL
204 Rows ?