I found this document to be very helpful.

https://brasshistory.net/Cleveland-Sistek Brass List.pdf

I found this document to be very helpful.

https://brasshistory.net/Cleveland-Sistek Brass List.pdf

@Dr-GO do you know if these Cleveland trumpets were a one piece or two piece bell? I've found one or two other examples of this model or similar model online and noted that my tuning slides are all silver plated inside the slide mating surface but the others I've seen are raw brass inside the tuning slide surfaces. The valves almost look copper to me. I'm assuming it's actually a monel alloy from 100 years ago?

@Dr-GO Thank you!!! I took this old trumpet out to the garage and played for a while. I'm in SW Colorado and we have some windy cold weather right now so I didn't stay out there for very long but had fun noting that it does seem to take on the higher registers fairly well. It's not a very bright tone. More soft or dull than what I would expect. Nonetheless, it plays decent for what appears to be about a 100 year old instrument that I don't think was played very much at all it's entire life. There is just hardly any wear or damage to be had.

@barliman2001 Thanks! I have no idea what a typical pea shooter from that era means. LOL!

Here are some pictures.

Bought a nearly spotless American standard high grade y Cleveland Matt silver with gold plating inside the bell. Super clean after I polished it. Very low number. 1885.
I think early 20s manufacturer. Anyone know much about these? History? Quality?