Just about every HEAD racquet that was made in Austria between 1985-1991 had for the European Market had "Vibration-Control-System" written on the frames. Some made over to the U.S.
Here is a Made in Austria For the European Market Composite Pro.
As always, Thanks for the clarification, vsbabolat!
While I got the hold of you, let me ask another question if I may
Along with this frame, also found a Prestige Tour 300 Trisys (MP)
Identical to a PC600 in looks, though the head size is a good 98sq inches (or more, imo) and says "mid plus" on top of the frame.
Has the suspension grip (which still seems to be in perfectly working order)
Could you possibly shed some light about this frame as well, if you may
And, we know you are a PC600 perfectionist.
What string do you prefer on it (I know you string at 25kg) and what balance pt? I can sign a confidentiality agreement if you need me to
I feel lucky about Prestige frames these days. Recently bought two made in austria above handle PT600s. No exaggeration, this is the best serving racquet, ever. I could never ace in a whole set with other frames. Now it is normal to pop one or even two within a single game! I am not sure if this is the case with all Prestige Mid racquets. As many people mentioned, there is certainly a power reserve right in middle of the sweet spot. If you find that spot and aim well, it is ace for you, no questions asked. If only it was possible for me to practise 2-3 hrs a day (and thus maximize the racquets pluses for my game, the precision and that sports car nimble drive type feel) I would play non-stop with these! But since I could not, my return and 2hbh are a big liability