TromboneChat

Does any body know what S-B F on a Giardinelli screw rim means? I have it on an old Sym T I bought.

I believe that was a custom marking. I have had a couple Giardinelli`s over the years with markings like that.
My Jiggs Whigham Giardinelli has JW-11 on the rim. I have another that just says "Special" , No other marking what so ever.

Interesting. It seems hardly different at all from my SYM-T with the standard screw rim