How to tell if lp is recorded with phase reversed?


I'm just wondering what is the best tipoff that an lp is recorded with phase reversed. I have a PS Audio GCPH, so reversing phase is easily accomplished. I have listened both ways, on some lp's it seems to sound better with phase reversed, but what are the obvious signs, or are there any? Thanks, Dan
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I have tried fliping phase many times with different components (including the GCPH), and I always seem to prefer non- inverted.

I wonder if there is some sonic penalty to the switch flipping phase?
When I had the GCPH in the system I shoudl have played a disc that says it;s phaze in inverted, like SHelffield direct to disks I believe. This might make a good test if you have one of these LP's.

Now that I am running a bi amped system (with a GCC-100 as bass amp) I can remotely just invert the bass (below 60hz)
Sometimes I find it is fuller that way, but usually less distinct.
Sometimes bass is not there in a recording even with the bass at full, so inverted phase of just the bass gets it to pop out. - This is seldom though.