Hello, 2 years ago (2017) I bought 4 tires on steel rims of tires directly and since I want to sell them again now, I looked for the DOT number but did not find it! It is only in a pressed window the number 2010 that would have to be the production year!? That would mean then that when buying the tires were already 7 even almost 8 years old!!! Can that be? Were such old tires sold to me as new? The tires are Bridgestone Blizzak by the way. in the purchase but is that permissible?