Re: 1914 silver plated Conn alto sax
First of all, the sax most likely is a New Wonder series I Conn, made between 1917 and 1925, The 1914 date that you are seing is the patent date for the rolled tone holes. Does it have a microtuner neck? If so, then it's a 1922 or later. I most definately would NOT try to recondition this sax yourself if you have no prior knowledge. I would take it to a reputable technition in your area. Most springs are available or can be fabricated and made to work. I purchase and restore many of these older Conn horns.