The clown that made this one could become Spain catalogue manager with LastDodo. He used a stamp issued in 1937 for a very fake overprint from October 1936. This overprint was not used on that stamp, nor on its Republican predecessor.
It looks like the overprint might have been in a very deep green colour. Edifil 9 has a black overprint on the earlier 2 cts. Republican stamp. This, however, has an additional line "CANARIAS" directly above the value. There exists an additional stamp (Edifil 9A) with that same overprint in a bright green colour on the Republican predecessor of this design. Maybe this clown tried to forge that one, using an earlier overprint, in too deep a shade, on the wrong version of the stamp.
Of course, the quality of the overprint shouts "FORGERY."
The other stamps in his listing are fakes as well. This one, from the same listing, is hilarious. If your overprint is too high for the stamp, rotate the stamp.

He has three listings. All are terrible fakes.
