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http://www.theswedishtiger.com/remove.html


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Sorry, maybe that is not a good thing to talk about here. I just removed the second picture.
I highly suspected that they were altered stamps when I acquired them. I collected them to see what technique people can do currently. These two examples are the ones that are easier to spot. I guess I'm the only few collecting this kind of stuff. I posted the pictures here not to confuse peopel, just for reference.It seems to me that this topic is too sensitive, I should stop right here.

If the overprint can be wiped completely and undetectedly, that would be very scary. A fellow from APS local club told me few years ago that anything is possible now. He had seen one that he could not tell it's been altered and yet he is an expert on altered stamps.

I see your point. If I post one that even an expert can't tell, that will create a signicant panic on stamp collecting here. I appreciate your advice.

I would not worry about the flying geese without denomination being targeted. We all know how many they exist and it is highly unlikely one would show up on an online auction.

The faint denomination that I took down from the posting is an obvious one, one that the maker could have made it completely undenominated. But again, he or she knows that it would attract too much attention then get removed by Ebay.

BTW, is there a better word to describe stamps like this? They are not fake but altered. Forging stamps or money can be called counterfeiting. Not sure about this.

I remebered I read this book at the library a while a go. It's a bit old. I'll try to look for newer edition if it exists. Thanks for the info.

­Ó¤H¨Ã¨S¶°¤jÀs²¼, ¤£¹L³Ìªñ¦]¤j³°¶°¶l¿³°_,¤jÀs²¼¦ÛµM¬O°ÝÃD²¼ªºµJÂI. Early US classic suffers the same issue here.
My job is related to test engineering, therefore I always look for evidence and proof.

¦b¬ü°êºô¸ô³o­Ó topic¤]¬O¬Û·í±Ó·Pªº. ­Y¬O½Í½×°°¶r, Secret Service ®£©È°¨¤W¨ÓºVªù.

Below is a very good and yet inexpensive way to detect fraud - remember to hover your mouse on the large picture at the bottom of the page.

http://petapixel.com/2010/03/25/how-photoshop-helped-save-my-dad-from-ebay-fraud/
 
©³¤U³o­Óºô¯¸¤p§ÌÆZ³ßÅwªº. He is a member of the APS.

http://riversidestamps.com/Fakes.shtml

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It is unclear to me whether there was a full pane (or several panes) ever existed. BTW, there is another famous variety - the one with the "two" slightly shifted to the left. I have not seen that one on auction for a long time.

A few minutes ago, while browsing through some of my covers, I found this interesting pair.

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