Before it became TAG Heuer, it was known as Heuer. When Tag does these limited edition ones as tributes to models that were produced before TAG acquired Heuer, I think they leave the TAG logo off. At least, I think that's the reason yours don't have the TAG logo.
Am I a dupe, or what? To remain silent and be thought a fool is better than opening one's mouth, and confirming it!
Just as a reminder guys, your accounts here also work on our sister forum, http://forums.calibre11.com dedicated to Heuer/TAG Heuer. 馃憤
mine are missing the TAG logos...I hope they aren't cheap Chinese knockoffs.