I did this for the fun of it. I could not get mine in better - its the one all the way to the right and was scanned at a different color profile than the 1st scan earlier in the thread. It seems a little closer to the original color. FWIW.

I also wanted to share this from another Board, "Your stamp is an SG40 or in the SG Specialised Catalogue, its a C10. plate 25 doesn't exist on these so you can knock that one off your list as a starting point. In order to plate these, a starting point is to look for a break (or definite weakness) in the right hand frame line about 1/3 of the way up, if you see one, it'll likely be from one of plates 37-49 or 58-60. Yours lacks that break, so we can start by ignoring those plates. That leaves us with 27, 33, 34-36 (not 35 as that doesn't exist on C10)& 52 onwards (50 & 51 have alphabet 4 letters). When you have an E as one of the letters, they can be either 'tall', sort of rectangular or squat, more of a square shape. Yours is the former. The tall flavour runs up to plate 49. So we're now down to a possible list of 27, 34 or 36. Looking at the imprimatur images its isn't two of those - I make it plate 34".
As Bobby said, its not an exact science. Anyhow, FWIW. What an interesting area.