Conn Unknown Model Bb & C (high and Low Pitch)
Date: 1911. Owned by Philip Wilkinson.
This appears to be a cornet version of this trumpet: Unknown model, Large bore Bb & C. I don't know if the cornet or the trumpet version was a special order, or if both were produced at the same time.
Here is an "unknown model", produced before Conn started using model names around 1920. The 1919 catalog doesn't show a model similar to this one. It is a #2½" (0.485") bore, Bb and C, High and Low pitch instrument. The High and Low pitch works by way of an insert slide before the main tuning slide. The two braces visible in the picture are attached to a removable slide. The slides installed on the instrument in the picture are the Bb slides, the slides in front of the instrument are the C slides. Apparently the receiver on this instrument is not original.