The 10H has an 8" bell and has nickel trim. If it has a Coprion bell, it is either a 10H, 12H Of overlap between the features, so please read through the entire section. In this section I will list several features, starting with the more distinct characteristics. Recognizing an instrument by its features If you own one of these 12H's with "Coprion" engraved on the leadpipe: it is rare!
Modified 12H Coprion was dropped in 1955 and replaced by the 10H Victor. Increasing their weight and adding nickel trim. A rare instrument indeed, because in 1955 Conn modified the 12H Coprion by This is a 1955, possibly 1954 12H Coprion. The 28H and 38H both have 7½" bells, the 48H has an 8" bell. The 48H has serial numbers from 6xx,xxx and
#Conn trombone serial numbers k prefix serial number
The 38H should have a serial number between 42x,xxx through 5xx,xxx. The 28H should have a serial number in the range 38x,xxx-39x,xxx. However, it might be a replacement brace. The slide section not to have curved ends for more comfortable holding, while the 38H does have that feature. The one picture I have seen of a 28H shows the first brace on As far as I can tell the 28H and 38H are very similar. I am not sure if that is also the case for the 28H and 38H. The 48H has "Connstellation" engraved on the side of the bell. If your Connstellation is entirely nickel plated with lacquered brass slide and tuning slide, it is a 48H. The 4H was made almost continuouslyįrom 1919 to 1958, serial numbers not higher than 6xx,xxx or 7xx,xxx.Ī Connstellation trombone can be either a 28H, 38H or 48H. It was produced for a longer time: 1947-1979 (serials 36x,xxx - GL9xx,xxx). Is identical to the 10H except it doesn't have a Coprion bell. Serial numbers of the 10H should range from 5xx,xxx or 6xx,xxx to 9xx,xxx. However, the 10H has a distinctive 8" Coprionīell, and nickel trim (as opposed to the 18H which doesn't have the nickel trim). The 20H has a 7" bell, the 77H has a 7½" bell.Īs far as I can tell, the Victor models ( 4H, 6H and 10H) didn't have "Victor" engraved on the mouthpiece receiver or the bell. If the serial number is 600,000 or above, it is almost certainly a 77H. If your Connquest has a serial number in the 400,000 or 500,000 range it shouldīe a 20H. The 77H was produced from 1957 into the 1970's. Both the 14H and 18H Directors have a 7½" bell. If the instrument has a Coprion bell it is an 18H. If the name engraved on the leadpipe is "Director" it is either a 14H or aġ8H. Check that name against the listīelow, which also gives some distinguishing features. There is a name engraved on either the side of the mouthpiece receiver/leadpipe or the bell. If you see a model number there (such as "1 2 H"), you are home free. Number right above or below the serial number, where the bell and slide sections come together. For a period from the mid 1920's through to the mid-1950's Conn stamped the model The next thing to do is to check for model names or numbers. Note that serial numbers on Pan American models This should tell you what year the instrument was built. Check the number stamped there against theĬonn brass serial number list. The serial number is stamped near where the slide and bell sections are joined. The very first thing you need to do is to check and look up the serial number. Recognizing an instrument through names and numbers Thirdly, I give a list of which trombones have what bell size (have your tape measure ready!įor the metric readers: an inch is 2,54 centimeters, and as usual European commas are American periods for decimal calculations). You don't know or can't tell the name and numbers on an instrument, scroll down to the section titled "Recognizing an I will first deal with recognizing a model through names and numbers. Is to look at the features of the instrument. The first is through the serial number andĮither the model number stamped on the instrument or the model name engraved on this instrument. There are three approaches to figuring out what model an instrument is. Consequently, this is only a general guide covering mostly instruments of 1945 and later. I admit that I am less adept at spotting the differencesīetween Conn trombones. Here is my attempt at a Conn trombone recognition guide.