If it looks like a Conn, quacks like a Conn and walks like a Conn, then it is probably a Conn. I have a 43xxx Conn from 1917 but the caveat is that stencils often had their own serial numberings which were independent of the manufacturer's charts. One thing's for sure, if it lists the 1914 patent, then it's not a 1901, unless you have discovered a time machine in disguise.
The design of the Conn baris and bass saxes did not change very much from the 1910s to the 70s or 80s, they had it dialed in, which is really not much of a surprise. It looks like a very pretty horn after the face lift you gave it, can't do much better and I'd take it over an MK VI bari any day!