I have touched on this many times, but IMO many of the "non-standard" year proofs are simply not, and this includes specimens graded by the TPGs. As one example, the Heritage Sale #3071(6 Jan., 2019) Lot 30670 coming up in two weeks is again IMO clearly NOT a proof. Many of the 1934s that have been slabbed are also suffering from the same inaccurate grading malady, so buyer beware.
Someone, please help with the pictures.