I was sorting through the hundreds of 2d reds that I just received and this is what I found. (And this is only the first examination)
Now in the ACSC page 4/258, 2018 colour edition it lists the following
96,97(16)s, but it is not as spectacular as this. ( there is a colour photo)
But here is where I am confused, on page 4/270 96(16) s says that the lower frame is missing and the value for used is very expensive.
But also on this copy there is over inking in the value frames on the left and right hand sides, and also behind the emu.
Also it is the single watermark, Crown & A
My scan is from the specialist check list for the 2d die 1, looking at your stamp it is clearly not missing the bottom frame. If it is State 1 (with bottom frame) it needs to have the left frame flaws shown on my scan. If it does then it may be an early version (state 1) which does not have any appreciable added value.
I agree there is some resemblance to your TWO PENCE marks on the 'W' but the extra white flaws on yours suggest it is not the one in the BW ACSC catalogue.
I cannot see anything similar in the check list so it may be just a one off, not uncommon on the KGV's.