Help Identify What I Think Is A Newspaper Stamp

The left smaller arrow is pointing to the 20 lepta Stamp where the circle part of the CDS looks to be hand drawn in as it's flatter and not consistent with the rest of the CDS. The larger arrow points to the right stamp where it appears from the thickness that it was brushed in as the rest of the CDS is thinner and the only part that looks different is where the stamp would tie it to the cover. I could be completely wrong, but that's what it looks like to me.

I would like to point out that the cover seems to have originated in Trieste, which was NOT Greek. It is addressed in Italian to Patrasso (Patras), which was a major city in Greece. The cover "may" have been forwarded from Patras, which would account for Greek stamps and cancels. The answer may lie in the meaning of the handstamp at upper right. An expert needs to figure out this cover's journey.

Now I suddenly notice another cancel, from Kerkyra, which may be a receiving mark if the cover had been forwarded. Kerkyra is the Greek name for Corfu, the second largest Greek island in the Ionian Sea.

Bump

Foto, I've been staring at this for 2 days now and swaying to the other side. The CDS on the 3 stamps is exactly the same as the top CDS on the cover. The 2 points I showed do look odd though.

The weakness in the strike (of the cancels) at your two points may be due to an uneven enclosure, i.e., a fold in the letter or document causing 4 layers of paper to go down to 2 layers. I have no opinion on the authenticity yet; that's why I bumped it, I want to hear from a Greek expert. Does it seem plausible that the letter was forwarded?