Tharruff, Your airplane hasn't flown away ! It can be clearly seen on your 'photo of the bell. It's not caught in the searchlight beam, where you might expect it to be, but quite low down having just taken off.
Bruce Bailey's post No.20 says everything anyone will ever need to know about tone hole corrosion. If it is the "ticking time bomb" that one deservedly well respected, but slightly mischievous, forum member once described it as being it may take some hundreds of years, if not longer, before the ticking stops.
I once took my Comm I with me for comparison with a very highly regarded, two year old, top make sax that was for sale and had once belonged to professional player Andy Sheppard. At the end of a couple of hours playing both horns in the seller's living room we both had to admit that the Martin was, as the seller put it, "a far better saxophone". I came home with my cash. Tharruff, as others have already said, I don't think you'll be disappointed with your Martin once it's been restored.