Date: 1926. Owner unknown
This instrument has the tuning slide in the slide. The screw is to adjust the tuning slide. Pulling the slide by hand would knock the handslide out of alignment. The advantage of having the tuning slide in the hand slide is that this allows the entire bell section to be conical, in stead of there being a cylindrical section to allow for the tuning slide. The 18H "Frisco" Artist was in production from 1926 to 1931.