Ah, yes, tread lightly there grasshopper. There were very few overall Wreaths struck and PL specimens abound. Since many proofs of that era did not have cameo devices, they appear rather specimen-like. I have known this series for over 25 years and managed what I believe to be a complete set in proof incl. the 1927 matte (but sadly not the 1926 pattern reverse!). I have seen a number that were slabbed as proof and in fact, were not. Also, grading on these seem to be all over the map even on those that likely are proof.
There are in many sources quoted to be 5-10 made of the 1928-1934 and the 1936 & I think it may be double that. I had tried to arrange a rarity scale in terms of which were least to most common of the proofs at one time; here goes my current estimates: 1930, 1929, 1931, 1936, 1934, 1932, 1933, 1928. You'll notice that the two scarcest currency dates, 1934 and 1932 seem to be more common as proof. I think that is because a number are in fact not and are early die stage currency strikes.
BTW, George's cheek, brow ridge, and mustache corner are vulnerable to poor strike and frequent bag and handling marks as are the reverse flower stamens and the orb cross or inverted "T" - not the cross that surmounts it as much.