How to tell if lp is recorded with phase reversed?

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.

... the difference is a sensation of "hollowness" , lack of dynamics and bass impact.

That is what we hear/feel in our system too. A small handful of our (classical) LP's give that giant sucking feeling. Big impacts start by pulling air away from you instead of hitting you with the initial wavefront. Creepy. We have no phase reversal switch, but swapping speaker leads is easy enough. Makes it all better, until you forget to swap them back!

FYI, Silent Running Audio has an Absolute Phase chart that you can download which lists the recording labels that had a tendency towards recording in phase vs inverting. This is just a guideline but may be helpful.

Just look at the woofer. When drum is played, woofer should move outward. If it moves inward, phase is reversed.

If the singer (soloist) comes from between the 2 speakers its in phase. If the soloist is difussed and no where in particular, its out of phase.