Uncanny

I recently stumbled across a small cache of Beach Boys promo 7" singles from the '70s. I have never seen any of these before. On all but one of the singles, one side has the stereo version of the song and the flip has the mono version. On the one single from the '80s here, "Goin' On," both sides have the stereo version, so I only scanned one side. To the best of my knowledge, these mono versions were only available on these singles.