Jim, if you read the whole auction description, you'd know :
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6214530830
though, I must admit, it's a lot to read. It says in part:

..... ...... As noted, I am auctioning now seven chips of seven products, listed above. An 8th product, "Moulded Mica," I have no dupes. The 9th and 10th products are "Monarch" and "Insulators;" for them I have only one dupe of each.

Robert