Cartier TANK AMERICAINE PLATINIUM "COLLECTION PRIVEE" full set

I was recently given a Hamilton Square Automatic as a gift. The watch came with no paper work nor gift receipt. I was only able to identify it by looking on the Hamilton web site along with other watch web sites. It came inside a silver tin box which was inside a black two piece box. Now I'm trying to identify if this is a sub model or a newer or older model based on an image, character, or symbol located to the left of the date, in between the hands and date. I have looked online and downloaded........

Here is the first annual Panerai Photo Contest. The winner will have his/her photo appear in the header for the Panerai forum as well as some Panerai swag I have acquired for this contest. Also, Elliot Lazarus has donated a Mario Paci XVI Nubuck Kodiak strap in any size in stock, to the contest for the winner. Thanks Elliot!!! Here are the rules. There must be a Panerai in the photo. That's it. You are free to do whatever you like. You all have seen my photos so you know creativity is a BIG fact........