"Incense and Peppermints" was produced by Frank Slay, previously known mainly for collaborations with Bob Crewe. By the end of the song, you travel back from a brief experiment with Psychedelia to "Sha-La-La, Sha-La-La". The group reportedly didn't care for the commercialization of the recording. Wonder why there wasn't a true Stereo Mix.
Reportedly, it was recorded and mixed directly to a mono tape machine. No multi-track tape. Not sure if I buy this account but this is the legend...
Bob