Posted By:
scott brockelmani am going to go out on a limb here, without looking at my set, i think ALL of the overprints are on 150 series backs, NEVER a blank back. i have 41 overprints so i shall check tomorrow.
also i disagree with the redemption theory, all of the overprints i have seen have the same characterstics, slightly angled, with the last few letters doubled. TOO much alike to suggest they were done at different times. ALSO many of the E107's, overprints included, that reside in 4 of the near complete sets originally came from 1 collection, they have 2 small spots of either pink paper or paper pulls at the top, there are also blank backs and 150 series from the same collection that have the same characteristics , they were obviously from an early mounted collection.
whatever the origin, each and every E107 is very rare(yes i will use that term) and every owner should cherish 1 or 100 of them. if you have 100 let me know!
scott