I happen to own this racket, read below for more references…

In 1980 Ultra Graphite was Wilson’s first graphite tennis racket and one of the first (braided) graphite racquets. Just like a wood racket it had standard head size and similar weight and balance with a constant taper from handle to head. It came with metal Perimeter Weighting System (PWS) plates riveted to 3/9 o’clock. Ultra PWS was exactly the same except Wilson was written on PWS plates.

In 1982 Ultra II was born. Wilson launched the Ultra 2 in three head sizes: standard, mid, and OS. The mid became a favorite of several players on the tour. The first version of Ultra II had metal PWS plates riveted to 3/9 o’clock. The later version had the integrated PWS, was made in St Vincent and one of the early player’s racquets to incorporate the stiff frame construction of braided graphite and boron.
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