David;
Yes, this is possible, but I would expect that the gloopiness would be at the beginning of the stroke, not in the arc. The arc is a hesitation point. When you start writing, the ink would normally gloop up at the beginning, I would think.
Again, I agree with mjp. Could be real, could be a fake, but I am not comfortable saying either.
For $300, you can get a book that is 100% genuine and certifiably genuine, so I would not pay $300 for one that may or may not be real.
Bill
p.s. I have seen some forgeries in the past where they looked fine in the photos on ebay, but when they arrived, they were VERY VERY bad forgeries. I could even see the pencil where they traced first and then went over with a sharpie SLOWLY. Because of this, I could see, on the back of the page, every time that he stopped and started again. Of course, I got my money back and they did not want the books back. I stamped them FORGERY in permanent ink across the signature and sold them as reading copies....