1960 to 71. I found all these years ago. At that time we had never even seen one.
Pair for $50 postpaid. Very slightly used to new condition. Some $5's have some tiny dings is all. Great perfect gold stamps.
I have 9 extra sets here. Nice mold for your collection as there are not a lot of Nevada chips with this mold most are Northwest- Wa.& OR. Another plus is they are marked NO. Las Vegas for your type or location collection.