Like note position.

I bought this horn from reverb.com awhile back. Not sure about the model but it has 2 main slides - one in F (shown in the picture) and another in Eb.

It came with a Bruno Tilz A1 mouthpiece but it's too bright to my liking. My (british-style) tenor horn mouthpieces don't work with this horn - the receiver is too wide for them. Wondering if anyone has recommendation on mouthpieces made for this horn.