This is the 180G from the earliest of the Classic Records Reissues of Led Zeppelin Physical Graffiti in NM condition.  I think because this is one of the earliest from the series, its before they put the oval sticker on there, but I've included a closeup to the portion of the inner card which shows this under license to Classic Records, Inc. (Please see detail photo).  The other giveaway to 180g vs 200g (besides the lower price) is the label itself which changed font and includes classic records on it, this version does not.  I've included all of the various angles from the photos included of the labels.  Most importantly is Bernie Grundman's initials in the dead wax which appears appropriately on all but side D.  This is the last known AAA pressing of Physical Graffiti, and probably the finest.