The tune which had put A&M Records in business in 1962, as: the most successful independent label ever (under the original, founding ownership of Alpert and Jerry Moss) for nearly thirty years (until: Universal's corporate whoredom decimated it through a series of acquisitions in the mid-1990s).
The nothing-short-of bizarre stereo mix of this (which, according to lore: was made by syncing two mono Ampex 400 machines in Alpert's garage together; to give the audible "illusion" of two separate trumpets being played --- Herb doing BOTH of them), by comparison, WOULD MAKE EVEN STEREO BEATLE MIXES SEEM "NORMAL"(!).