My records show that your horn, according to the serial numbers you gave, was made c. 1970 to 1975. This isn't the Buescher Aristocrat of the 40's and 50's that so many speak fondly of, but a Selmer student horn made quite some time after the unfortunate Selmer buy out of Buescher in the 1960's. Never the less, if you like it, and get a good tone out of it, keep it and enjoy. Price wise, it isn't worth the money that a Classic Vintage horn is, so don't pour a lot of money into it getting it setup.