

Not everyone cares much but there are time periods where lore is that manufacturing quality was much higher and much lower, and that's a good time period. The answer burgerbob gave is pretty much right on the money, but I do want to add something given the serial numbers: Are these just newer models? Any help is appreciated. Searching on Ebay, it seems all the listings are for just plain Conn 88H or Bach 42B, but on the Conn-Selmer website they don't seem to have either model - instead the Conn 88H seems to come in 88HTO, 88HO, 88HKO flavors and the Bach trombone with the same F-attachment and valve type as me is listed as a 42BO. I've included photos of the bell, serial number, mystery number, and valves in case valve type is relevant for determining the model? The first number corresponds with possible serial numbers, I couldn't figure out what that second number is. There's another number on the slide brace - B4274. At least, I think that's her serial number. My sister's horn is a Conn 88H, Serial NO: 976619. My horn, from what I can gather, is a Stradivarius Bach 42B, Serial NO: 111606. I saw on the Conn-Selmer website that some horns are listed as student vs professional - I'm not sure if either of these would be student horns.

Edit if it's relevant: my parents purchased these for us when we were in high school.

Both horns are missing lacquer in different places. My sister's horn is kinda beat up - lots of dents all over the place. I have no need for two tenor trombones with F attachments, so I'm trying to figure out 1) what they are, 2) what each might be worth (assuming good condition), and 3) if there would be any quality differences between the two horns. My sister also played trombone, but no longer does so she gave me her old horn. I grew up playing trombone and have recently gotten back into the hobby.
