Question about prototype 03 Tour

Thanks in advance for your help. About a week ago, I was given an 03 Tour by a friend of mine for stringing. I had previously heard from him that the racquet was given to his older brother by a Prince rep at some indoor tournament or clinic. I had hit with this racquet and was surprised by my own enjoyment of it since I play with a PK Heritage Type C 93 which is quite different.

When I put the racquet on my stringer, in the throat I see no standard decals (which would indicate headsize, tension, use Prince string, blah blah). Instead, I see the inscription "TX141-100 SL TOUR WEIGHT". Any ideas on what this means? It says "Midsize+" on the head, has glossy paint, looks like a 100 Sq. In., appears to have a standard 27" length, feels heavier than the normal 03 and has the rubber thing in the throat (ie-not just the hard plastic one). Thanks again!
 
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