S&S "S" Treble wire

[A440A@aol.com]

>It's about 15 years old.  Would it be advisable to go to a 12   gauge
> string instead of the 13 which is labeled on the plate? 

My listing of the Steinway wire sizes for an S give two notes of #12 at the 
top.  #13 will not usually work up there. 
REgards, 
Ed Foote RPT