I've been given a trombone to try and learn to play, but I don't know whether it's an alto or a tenor trombone! At concert pitch, it plays F, Bb, D, F and Ab in first position as much as I can reach. I looked on the internet and went to chappell's of bond street, but they just searched wikipedia for me and didn't know an awful lot which was helpful. The bell's between 7.5 and 8.5 inches.
Can anyone help? Thanks for your help!