Help Authenticating 501-0657 Big E Selvedge

Hello! Hope everyone is doing well, first time posting so I apologize if i’m using the wrong format or if anything is off in any way. I would greatly appreciate some opinions on these Levis 501s. Have got alot of differing opinions on these but leaning towards fakes. Everything seems quite accurate and well done (aside from the 501 button stamp), but i know fakes can be pretty good these days. No inside tag but a faint 7(?) stamp on inside pocket. If you need any more info and pics please let me know. Thank you, any feedback is appreciated. Please take this with a grain of salt as i know chatgpt is not correct a good amount of time but it is convinced these are transitional Big E 501s from ~1970–71, after uploading photos and gave me a bunch of reasons why so. Now of course i know that it is not a reputable source but I figured i would mention this anyway.

https://imgur.com/a/Y17pU8F

Thank you! Very interesting, so the 501 stamp was used but generally not for 1970s/Big E