Olds Marching Trombone vs Dynasty M571 comparison

[hntjr]

I have been looking for a F. E. Olds Marching Trombone O21 (Reynolds Contempora TV29) for quite awhile. I have a WTB on this website this year and last year, but nothing! Today I was searching around the web again for the Olds and came across a silver Dynasty M571 marching baritone in very nice condition that caught my eye. My impatience is getting to me after several years of looking for the Olds, so I was wondering about what the difference would be in quality and sound with the M571. Anyone have some input from playing the M571 and/or Olds O-21. I own a mint Conn 90G trombonium. I'm holding off from selling it until I find a better replacement for me.

Since I am expanding this search to the Dynasty M571 - Marching Baritones, perhaps I should ask the question, what is the best vintage Marching Baritone you would recommend and why?

I own a minty Conn 25i euphonium/baritone and enjoy playing it quite a lot.

Initially I started my quest trying to find that Miles Davis muted trumpet sound. I bought an Olds Recording Trumpet in excellent condition and found an Al Cass doubling gold plated mouthpiece, but I could not get any upper range. Unfortunately I have an injury to my upper lip that created a dimple in the middle of my lip. Ugh! So trumpet size mouthpieces do not work for me, but I still like that Miles Davis sanguine sound and would like to come as close as I can to reproducing it even it is in a lower range.

I'd appreciate any and all advice. Have a good day.

Nelson