Saxophones Conn alto age

[jtd]

Hi All. I just came into possession of this Conn alto sax. Serial is 6503. Per all the list I've been able to find, I have a hard time with it being well over 100 years old.
What am I missing? Getting ready to make it play well again. Just regular flat metal reso's but not original 😉. Any help is appreciated. Thanks, Jeff

 

[jtd]

Forgot to add pics