Jeff, I didn't even know what to call that range. 510? Doesn't that cover all of the 5100 watches? 1000 series? Yes, but that would get confused with the 1000 Divers and the later TAG Heuer 1000 series.
A good name is very powerful, an ordinary name is at least helpful so you know what you've got...but just the code name? Reminds me of Mclaren's depressing decision to call their new car the MP4-12C. F1 lovers know what the MP4 means...but compare this mouthful to the simplicity of "458 Italia". Surely even the McLaren Woking would have been better...:)