Hi, Peter. From the serial #, your car is a late pre-L (chrome bumper model) from mid-1972 but is otherwise unknown in the Club. Since it was likely first sold in Europe/the Mid-East, the best source of info will be Santiago DeTomaso, son of the founder who still has all the records of Euro-sold Panteras. He can be reached at santiago@sdetomaso.it This is a side business for him so there will be a charge.
Incidently, nearly ALL '71-'75 Panteras sold in Europe were called 'GTS' models but many had features not seen on U.S models. Many had specific-country parts included.
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