The more i think about it ....i dont have a clue how you spot them.
 
	Your brain must be sharp to notice all these at a show..........The 1913 at a show there must be loads,and need to check them which takes time unless your only after one or two coins.....i.e That particular one F175 would only take a glance..........but only if you want one  
	Is it your only looking for a couple now .
 
	I would think i knew indicators for coins i was missing but you must spend hours trying to find something a dealer wasnt bothered about / missed at a show .
 
	 
	Jerry whats the secret or do you walk round with a book or notes  list of indicators ?.