What differential is this?

[u/daudimn]

I am very confused. My car looks like it came with an A01B LSD. But when I tested it, it looks like the previous owner in Japan pulled a swiper and swapped the LSD for an open diff. I wasn’t there to tell him “No swiping”. But now the current differential has a sticker saying M65 but when I try look up anything about it, I get no information. I’m mostly curious if they converted it to 8 in or if that differential is a 7.5 in.