"Death Mask" Stamps Of Serbia?

Does anyone here on S.C.F, own any of these so called "death mask" stamps? To be more specific this refers to the first five values of the 1904 set of Serbia which have the dual profiles of Karegeorge (Serbian Patriot) and King Peter I. B turning these stamps upside-down there will be revealed between the profiles a supposed death mask which is claimed to be from the head of the previously murdered king Alexander. This is considered purely accidental.

I would like to see a scan of one of these please. Thank you.

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As I understand, You are talking about Issue for SERBIA, 1904, Sept. 8/21, and Michel catalog list it under number 76-83.
Personally, I was in possession of few sets of it, but it was very quickly sold out, because "classic" period as is, and because this "conspiracy" about "hidden message" by design, was frequent topic in Philatelic Communities worldwide!

(shown: Serbia, Michel catalog number 62-71)