Tag Pro's, Please help with age, name, value of my Tag Heuer

[weathernet]

First of all, I apologize in that I do not have a picture, so I realize your help is limited to my description.  I have a older Tag Heuer watch, but do not know its age, exact style, and rough value.  To begin with, a local Tag Dealer felt it was definatly authentic..... it is a Professional Series, but looks like the newer Aquaracer 200 meter style ( Blue face and blue bezel ); has no numbers for hours, just hash marks.  Has date at 3:00 oclock hour and logo on face is TAG ( in green ) HEUER ( in red ).  My watch is also a 200 meter.  In fact the only difference from the current Blue on Blue Aquaracer, is that the current model has two ( 2 ) hash marks side by side for the 12:00 o'clock hour, where mine has only one prominent upside down triangle for the 12 o'clock hour.  Even stranger, is that my model # WD 1214-G-20 does not seem to exist anywhere i've looked.

Any thoughts???

Thanks,  Andy

[Gary Colclough]

The watch is a Tag 1500 , I sold one recently for £250 though this was to a friend so you may get a little more