The Conn 22B Trumpet with the serial number 5,760,742 is likely from the year 1974. Conn's serial number production records indicate that the company produced instruments in that range during the early to mid-1970s. For a more precise identification, it's often helpful to consult specific manufacturer records or databases.
That would be the serial number which can be used to date the instrument. Your Boosey and Hawkes trumpet was made around 1964 according to that serial number.
I think the value of your trumpet depends more on the model of your trumpet, how old it is and of there's any dents or if any part of your trumpet docent work.
Best estimates would put your trumpet manufacture date in the range February 1964 to February 1965.
Best estimates put this trumpet as being manufactured around 1958-1959.
To determine the manufacturing date of a MJ Kalashen trumpet with the serial number 381B, you would typically need to consult a specific serial number chart for that brand. Unfortunately, I don't have access to such charts. You may want to reach out to the manufacturer or check online forums dedicated to brass instruments for more detailed information regarding the serial number's date of production.
Between 1959-1960
The value of the trumpet mostly depends on what condition it is in. Say the valves or the tuning slides are all seized up, the trumpet would not be worth much. But it really depends on the buyer.
The serial number does not tell us which trumpet this is only it's year of manufacture which I guess to be around 1967. Conn made varying qualities of trumpet which were built to different specifications and prices. Some have value in the vintage market and some do not.Some of the trumpets they made are:Conn 14B Director36B28B22BVictor Coprion bellAnd that's just a few.use the link to identify the model you have and resubmit a new question.
You would put the engine serial number under "Equipment Serial Number"
I would like to know how I can be sure that the bell and the slide are the original combination. I bought an old Bach 12. Engraved in the slide is 3623 Model 12. The Bell says New York 67. The colour of the Bell and the outer slide differs a bit (the slide has a red nuance). I am very happy with this instrument, but I would like to know about this. :-)
$1800.00 --- I would have to say that that valuation is way too high. I have just purchased a collectors item Olds Mendez serial number 86xxx from Ebay, which was manufactured in 1952 and is in reasonable used condition with original laquer for $800. The serial number 308xxx would have been manufactured around 1958 to 1964 after the factory moved from LA. Your Mendez appears on the Olds register and is dated 1959.
Would need serial number to answer or go to proofhouse.com with serial number and look it up.