[@Rogue Colm]

Just because it's Dwarven doesn't mean all other races wouldn't have a clue. 

Besides even if my character can assume a coin can be used to trade,  no matter what currency it is.  It doesn't mean I know if it's valuable or not which is what I try to figure out. 

After all,  I got a few Gold pieces,  which is the standard currency along with it.