See various rants in the TPG thread! There is a ton of mis-attributed, over-graded, and fake stuff out there, on balance I would say TPGs help to limit it, but once slabbed it is often taken as gospel .... if you can spot a coin that has been mis-attributed there are bargains to be found
First of all, the 1st bust is the easy one to identify. At the back of the head, the hair forms a circle as opposed to a lot of roughly parallel strands found on the 3rd bust and variety. 4 x 1st bust shillings in varying grades in the first image and a better detail worn 1st bust example in the second showing how easy it is to see the variety even when badly worn such as this one.
Probably been told 'old pennies' are rare and has plucked a figure out of the air. Hilarious. Very honest. Says it belongs to the right person. Correct. If the grandfather looks after it for a few more years, no collector will have to suffer ownership.