New York later vintage....Clifford Brown piece...they're marked 17C1 but that's not following Bach numbers, it's a muck 17c number....this piece as many of this period were originally nickel silver underplated with silver on top....plating most of the time is almost all gone but it does tend to protect the pieces well....this has been replated as it was necessary but piece was in great shape!!...... i'm getting either a loose 28 or tight 27 throat....in great shape!!