So, I got these off my drummer recently. I have 425s already

Things I noticed on these 535s: no serial number, the cable says 215 and is marked 2021, the connection point is not flush, the connection doesn't have the star pattern like my 425s, the point that the bud tip goes on is a bit rough, on all the shure stuff you can see alot of gold at the connection point on these I can only see gold at the tip of connection not the inside bit.

Any help is greatly appreciated