It looks like a generic Mark VI (ish) copy, the thumbrest has a particular decorative element that I’ve seen before ( and even then it was on some obscure saxophone, sorry but I can’t find it back on the many threads of unidentifiable saxophones here in the archives) but this points out to an early Asian copy. In all fairness , nothing makes this saxophone noteworthy and you will probably never find out the exact name of the obscure factory which made it.