Hello bassaxman88, i own a perfacktone tenorsax. It's a stencil horn. This one is a Conn manufactured type. On the low back of the horn you might find the serialnumber mine reads: patd.sept 14, 1914 a long number 11593489 ( i think pat.nr) and T (for Tenor 50779 (serial) L (for low pitch A=440) There are some registers to be found on the web that can tell you something about the age of the horn (serialnumber). Good luck.