I didn't look closely at the photo on an auction I won for some UK stamps with overprints. I received yesterday an envelope with these UK definitives (KGV, KEVIII and KGVI) with two different overprints, one says "The Bluff Charta" and the other "Jersey 1942" with a swastika.
I spent a while Googling last night and found that the Germans printed low value KGVI stamps with small anti-communist and anti-semitic details, overprinted with "The Bluff Charta" and they're extremely rare. These stamps don't have the sickle and hammer in the corner, or the star of David on top of the crown, so they're not those. Plus there are postmarks on some that are far more faded than the overprints. So I'm guessing they were overprinted long after the 1940's.
The others are more confusing to me. I found mentions of low value UK definitives overprinted with a swastika and "Jersey 1940", but I could find no mention of 1942. And the Germans didn't use overprinted stamps during the occupation of Jersey, if I understand what I've read correctly.
So what exactly do I have, and are they only worth keeping as a curiosity?
I think you can view the scan at this link
https://docs.google.com/file/d/0BxR...?usp=sharing