TromboneChat

Hello, does anyone have any information about the mouthpiece (or markings on it) found here?

https://www.ebay.co.uk/itm/Vintage-Trom ... 632-2357-0

Thanks!

Here's a picture

While I'm no expert, I'd guess this may be a genuinely custom mouthpiece with a personalized engraving. The unique markings and relatively simple design seem to suggest this for me.