Welcome to CoinTalk! It looks like a normal 1979 clad quarter that has seen some wear and been in environments that caused it to look rather unappealing. I'd say it is worth a quarter. My children would say it's worth a gumball.
Not to beat you down much but it's just corrosion and circulation staining. Pareidolia. Worth 25 Cents U.S . Maybe a gumball for sure, love it!
I could clean it and give you a better picture but then I'd be beaten roughly about the head neck and shoulders for cleaning it. I know how that works.
Seemed pretty apparent in the pic, but if you're only reading and not looking at the added pictures I took the time to add .. then, I'd agree 100% with you. My up bringing taught me to always use all my available assets but I get it that everyone is not me. So for those who are picture blind for lack of better understanding... (And don't be a hater because I said that) ... But I'll type it out for you... The date reads 19797
Pareidolia Sir. Nothing more. Try some "acetone". Maybe get a clearer picture helps also. I see blurry to begin with....
I used "all my available assets" to know that the complete date was put on the master die starting with the cents in 1909, and by the mid 1980s the full date was on the galvano (master design). So... what do you think it is? I mean, considering my lack of better understanding and all.