Nice! Almost as impressive as my collection 
Good luck getting those last two bronze-AT's.
p.s. - The "zero set" isn't really "a thing", unless I guess if you guys insist on it being "a thing"
Not a thing, but a nice "subset" of the Satoshis for those into numerical collecting of cryptos.
I know people (myself included) try for certain numbers if available from manufacturers.
For some, it holds meaning. For others, might just be a random.

Excellent point, I agree.
I have a couple questions, since this is the Ravenbit-Reference-Thread (RRT):
(note: these are being asked after reading most/all of the forum pages involving trades/sales/auctions of the Ravenbit coins)
Absolutely, I encourage any and all questions to be asked in this thread.
4 were sold after the completion of the auction and 1 was kept in personal collection.
Sold to a buyer who contacted me after the completion of the auction.
They were never for sale and I still have possession of them. I list them in the mintage for the sake of transparency and thoroughness. The samples do not have serial numbers and 2 of the 4 are partially "frosted" on the obverse. When I get a chance, I'll post a pic.