[Legit Check] SBB 1s

Hello, I'm new here. And I wanted to get a LC on these SBB 1s I got from an eBay seller claiming its real. But when I tried to sell it the buyer said it was fake. So I went on a few forums like Niketalk, Kicksworth, and Facebook to get clarification. So far I got half saying it's fake and the other saying it's real. I just need more input on it please! Thank you!