Thomas & Thomas
You can go to their web site, contact customer service, give them the serial number and they will tell you the age and perhaps value of the rod. From the information you have provided, the 9' is the length and the #12 is the line size/weight which, as its name indicates, is used for very large fish like tarpon that can easily be in excess of 100 pounds. This is at the very large end of specialty fly rods and is used most often in Florida and parts of the Caribbean during the spring migration of these formidable fish. To a lesser extent, anglers pursuing juvenile bluefin tuna in the NE use a rod like this too.
Oh and, yes, T&T is a very high quality rod.