Throughout the literature there is noted that just one stamp is known from plate 91, perforated by Henry Archer as part of his separation trials. Seymour, SG Spec and Statham - and possibly others - all note this.
It appears though that no-one, at least in living memory, has any definite record of an Archer from this plate, and it seemed likely that the claimed plate 91 was a case of a misplating - until now.
There is no question the stamp above is from plate 91. Apart from the letter positions, the alignment with stamp MG below is unique in this group of plates. Additional evidence is the blur mark running between LG and MG at the far right, that is clear on the Imprimatur sheet.
Also beyond doubt is that this is a genuine Archer. The fourth perf hole from the bottom on the left side of the stamp is positioned out of line to the right. This is exactly how this perf hole appears on other Archers I have scans of, from the F and G column.
A most important find!
The question that remains though is - is this the single stamp noted in the literature or another?
