Yes this is exactly what I was talking about... you can see very clearly the distinct differences in these 3 paint finishes, obviously different paints have been used, so to say the silver sealer formula has never changed is just marketing BS!
The 1st shell is the modern 'flat' silver/grey finish, and looks more like a primer coat than a top coat.
The 2nd shell is more like the original but still has a flatter finish and an almost blue tint to it, still has a hint of primer about it.
The 3rd shell is classic sealer in a Jasper shell I believe, this is the true original Gretsch formula and appears far more metallic silver with a glossier finish.
Let's face it though, it's just silver paint, anything will do if these 3 shells are anything to go by !