Great find! Not often are any decent chips found at the flea market or antiques shows.
Updated info. I found 5 after my last book came out. I valued them at $1,200 ea. Did some trades, sold one or two & kept one.
I will make it a 3rd issue to match the $5 black with 3 large mustard inserts.
I would say on todays market for this chip which I consider a top small town casino chip value is $1,200 to $1,500.
Mine were all about mint. Yours looks real nice too. I was very excited when I found mine as well & still am! This set from Diamond Jims is one of my favorites.