A 1967 model is a few years past the Selmer buyout. By then, many of the original Buescher features may be gone, such as Norton springs and Snap-on pads. However, 1967 is still close enough to the buyout that Selmer may not have tinkered with the Buescher Aristocrat design yet. The design dates back to the 1940's Big B engraved Aristocrat, which continued throughout the 1950's with simpler engraving into 1963 (same horn). These are fine tenors, and I would think that any Selmer-made Buescher tenor built before 1970 would essentially be the same horn with cheaper Selmer pads and standard needle springs. In other words, it ought to be a very good instrument. The 1951 Aristocrat tenor is my horn of choice, and I would not hesitate to pick up a horn like yours as a backup, as it should sound exactly the same as my 1951 (same neck, body tube, bell, etc). Selmer bought Buescher to eliminate the competition to their French-made Mark VI, but wisely continued making the horns, calling them their "student" models. There WERE NO STUDENT MODELS before then, just stencils (i.e., Buescher would make their Aristocrat engraved as an Elkhart, with different engraving and somewhat simplified keywork, but same body tube, neck, and bell). Some time after 1970, the quality of build begins to deteriorate, but your 1967 is likely still the real Buescher build.
Jicaino and Saintsday and Bruce Bailey, who frequent here, probably can supply more detailed information than I, but I cannot see your being disappointed in this tenor for $475, IF it is in full playing condition, ready to go.
Sax Magic