Ah, the Grafton “plastic” (actually its acrylic) saxophone. Famously played by Charlie Parker and David Bowie, crafted by an English company, designed by an Italian, it is, according to sales literature of the time, a “tone poem in ivory and gold”.
This particular example has actually been repadded by some enterprising repairer (I say it this way because they are notoriously challenging to work on) and it has been done rather well. It plays, as you may or may not expect, very much like a saxophone and there is not much in the playing of it to convey that the instrument you are playing is wholly unique, with new methods of manufacture and the completely singular keywork mechanisms that its injection molded acrylic body required. It is comfortable under the fingers, responsive, weighs about what a normal sax weighs, and plays with a warm, if somewhat uncomplex, tone. It is in fact quite an amazing instrument when taken as a whole, and the experience of playing it leaves me with wonder and respect for the company that made it.
These are famously known for being delicate, and not many have survived to this day. This example is in quite good shape, with the only body repair that I can see being the bell to body brace looks to have been shored up with epoxy where a crack was forming. There are some small hairline cracks near the tenon receiver, but they are minor and do not appear to be spreading. The finish on the keys is original, and the neck is in very good shape with no evidence of past repair or pulldown. The keyguard is complete and undamaged, and it comes with its original Dallas case.
Here’s Bird on his Grafton, which he played on the Massey Hall album:
Here’s Peter King playing Parker’s alto many years later.