how to tell on first pressing vinyl releases

I found a site that shows some pages of the aforementioned book it is: http://www.recordranch.com/index.htm

Stereophile did have an article explaining the writing on the dead wax.I think it was M.Fremer.Very good explanation!Does anyone know what issue that was?

As I remember it, the number stamped between the end of the last song and the label can indicate is if it's a re-issue, if it has a - and then a number. BTW, there is some correlation between thickness and quality of recording, based on some original pressings(not speaking of audiophile re-issues here). For instance, "Elephant Mountain" by the Youngbloods has 3 different thicknesses. The thickest(earliest)sounds way better than the other 2 thinner ones. I've not seen this thickest one for sale anywhere.

Thanks for all your answers.

The info stamped in the dead wax is the same on both LPs that's why I'm extra perplexed. But the thickness of records as mentioned by Mmakshak is interesting to me because one of the vinyls I'm talking about is thicker than the other, has a different feel and is heavier. It's almost like a 78rpm grammophone record!

Any more info you might have is more than welcome. Does anyone know if labels from any particular period were laminated?