I have several different ones, some are older - like one is from Rainbow Casino in Wendover. All are in boxes but none are sealed. I'm not sure where some are from. As to the back of the cards - the one Rainbow deck has no markings on back but someone has taken a marker to the top of the cards & the very inside flap of the box was written on by casino
Since I'll randomly pull another deck for the 2nd auction I do not know which casino it will be from. Sorry. I have some from Wendover & some from Vegas and like I said some are older, some are newer. Most haven't been touched since they were brought home but I can't promise since several were collected by my FIL