Dipping is weird. I don't know the exact science going on, but it seems the most reactive silver is on the surface. So, freshly struck silver...
Tom B is right. However, the "problem" is there is no uniform look to a dipped coin. I can take a ugly 1955 Franklin, dip it ONCE properly, and...
Oh, come on, that is just salesmanship. Every seller of an item will use about anything they can to convince you to pay their price, not yours. :)...
Separate names with a comma.