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I have an identical York Monster Eb that I also found in a pawn shop. Like mine, yours is High Pitch - the tuning slide is too short to be anywhere near A440, it's 1/4 step sharp even pulled out all the way. The Low Pitch slide would extend down to the bottom bow. For it to be usable I had Joel Bristor make an extension for that main tuning slide. After that, a valve job, a new leadpipe, and fixing a lot of loose joints and braces, it plays quite nicely in tune. Mine now has an American size receiver and seems to be tolerant of a wide variety of mouthpieces.

I can make shanks for my mouthpieces that fit the old small receiver that yours has, but it may need a lot of other work and you might just replace your receiver or the whole leadpipe.

Any of the Denis Wick number only series will fit. The receiver is pretty identical to the large shank trombone mouthpiece. I'd probably go with a Wick 3 or 4.

I have a Martin that is similar to yours. It came with both a low and high pitch slides. I had Lee Stofer adjust the slide lengths to allow me to play 440. It is now very well in tune. He also redid the valves.

As for the mouthpiece, I did try the Wick 3. I found it to work rather well. It does have a deep cup shape. I found it has a rather small rim. You my want a 1 or 2 rather than the 3. The 4 was way too small. I have since modified the receiver to handle American shank mouthpieces. I have found the Sellmansberger Imperial and Symphony work well for me along with a Stofer Geib. If you like the horn, I suggest you get the restorations that have been suggested in this and other posts. Plan on spending more than the horn will ever be worth.

Had one of those for a while. Great little horn - a 3 popper.
Same issue with the HP/LP so I built a longer MTS. That was not a big deal as I had a York Eb LP crooks in the the junk box. But longer ferrules would work as well.

Yes, the smaller shanks on the Wick MPs worked. But I thought it would be more useable to have a standard American shank receiver that would accomodate most MPs. That was an easy fix. I eventually found a York MP to go with it, but did sell the tuba. The mouthpiece is really rather small by modern standards.

Mine had a very mellow sound, but the valves were pretty worn. I often wondered how it would sound after a valve job. Perhaps a bit tighter sound.

Very comfortable ergonomically if you like holding it at nearly a 45 degree angle from the body and sitting in on the right thigh. Since it was pretty light that was no problem.

PaulMaybery wrote:Very comfortable ergonomically if you like holding it at nearly a 45 degree angle from the body and sitting in on the right thigh. Since it was pretty light that was no problem.

I was wondering about that angle myself. It's OK but feels a bit strange.