TromboneChat

One more time for the trombone hive mind: do we know what this is?

Not much info to work off of, bell diameter and bore and we can find out model. My first instinct is that it’s a 4H

Thanks Elow. You've got what I've got. I'm trying to get a bit more info. Actually I do own a 4H, Elkhart era. Mine has the Conn counterweight on it, this one does not. I'll see what other info I can get!

Is this the one you posted before with the Union Label?

Is it High Pitch or Standard Pitch? Hint: if it's incredibly sharp -- almost in B natural -- it's in High Pitch. (It doesn't look like my High Pitch King).

Conn didn't start using letter model numbers until 1919. This could very well be the predecessor of the 4H. You need to measure the ID of the inner slide.

Looks a lot like a 4H. Friction fit means earlier make (1920s perhaps or even older)

Could also be a 2H predecessor. The stamped letters below the union stamp would help identify it, or else the bore and bell measurements.

Case style is 1930's/early 1940's. Nickel-plated inners or chrome-plated inners? IME Conn began using chrome-plated inners in 1928. Bell engraving is identical to my 1927 and 1928 4H's, and the blueprinting appears identical as well, but the case interior has the same layout and cloth color as my 1941 24H.

Thank you for the replies. I'm going to go take a look at the horn and hope to get some additional information. I do own a 4H, and there are similarities. It's likely that's what this is. While much older (from the comments above), this one appears to cosmetically be in nice shape. I think the condition of the slide will trump all. I don't have a caliper, but I'll measure the bell and find out as much as I can. (Or I may just come home with it and post more pics)!

For what it's worth, the case cloth and materials look the same as my 1932 24h case, the layout has minor differences but is very similar (the retaining tabs are arranged differently, I have a block shaped to hold the counterweight in place). The bell decoration looks the same at a quick glance.

I believe the case is a generic (i.e. used by many manufacturers). It is similar in design to the case on my King 1115 (1930, TIS).

If you decide to buy it, slide condition is paramount, Older slides are much harder to work on.

There was one other picture. If the case was designed to take the abuse and protect the horn, I guess mission accomplished:

Top image is the OP's horn; bottom image is my 1928 4H. Only very minor variations in the engraving.