For comparison double impression stamps of the underlying series, see Eric Jackson's website. He usually has illustrated examples of double impression items for sale. Perhaps Eric will see you post and answer directly as he is on SCF.
That said, I only collect the underlying documentary series (due to uses as you showed here: http://goscf.com/t/78071
) and this looks like the double impression I own of the various denominations, including the 2 cent shown.