I see these chips available from poker chip vendors online and wondered if they are real, or not?

Could you buy a rack of $25's and then take them to play in the casino at a even money bet? I have some from Harrah's Laughlin that they gave me to play, I got them directly from the cashier cage.

ChipGuide says they are current. (image from ChipGuide)

Is there a back story to chips such as these?

Thanks