Reversed Polarity LP Cuts - Examples?

I recently bought a custom made phono stage equipped with a three-position polarity switch on the front panel with the positions "+", "mute", "-" and, so far, have not had occassion to use the "-" function. I found an old UK pressing of the Stones "Sticky Fingers" at a garage sale Saturday and, after a thorough cleaning, found that a few tracks sounded a bit "flat", for lack of a better term. Recalled the polarity switch and snapped it to "-". Huge improvement.

I have heard vague mention of LP's or tracks of LP's being recorded "in reverse" before but am wondering how commonly this is found. Can anyone give specific examples of what they've discovered (not including intentional phase shifting done for particular efffect, such as used by the Beatles and others). Thanks.