Originally Posted by screamingmorris

I forgot to mention this, but you might have already done the checking.
The ad for the 1940 22B you are interested in does not include the serial number that you can compare to the list at
The Conn Loyalist
You should get the serial number from the seller so that you can find out for sure that it was made in 1940.
The seller could be mistaken about it being a 1940, although even if he is off by a few years that wouldn't change the fact that it is a *great* 22B.

Also, the seller does not mention how he knows that the trumpet is a 22B.
Although most 22B's from the 1920's through the 1970's did not have "22B" stamped on them and you have to use various other methods to identify them, Christine at the Conn Loyalist says:
"For a period during the 1930's and 1940's Conn stamped the model number underneath the mouthpiece receiver."
- quoted from
The Conn Loyalist
(where she even shows the "22B" stamp on a trumpet)
So it would be good to ask the seller if "22B" is actually stamped onto the mouthpiece receiver.