The liguistics goose chase - a mystery in progress

One of the nice things about working at big, global company J in Europe is the access to a number of people with foreign language skills, who are usually willing to help with something, inside or outside of work.

I have a letter which I discovered during my genealogy research. It has a story attached that it was sent to my great-grandmother from Europe, and that it has something to do with two of my grandfather's younger brothers. Both were killed during WW2 and are buried in military cemetaries in Italy. My grandmother remembers when the letter arrived, and that her mother-in-law had taken it to the Veterans' affairs office who instructed her to ignore it, that it was a plea from someone in Europe who had somehow found out her name, and would try to ply her for money as Europe as poor after the war. (Her memory of the story, 60 yrs later!)

So I have two pages of a letter in some foreign language that I cannot identify. I've toted the thing around here and there, and based on my own knowledge and that of others, it's none of the following:
-English
-Spanish or any other Romance language. I cannot make out a single word here, not one. Usually from my Spanish I can pick up some similar words from the Latin base.
-German
-Polish
-Lithuanian
-Russian
-Dutch

My Dutch colleague suggested that it has a Slavic base, his feeling was that it went toward Russia and eastward, due to some of the characters seeming to be well outside of a Western Europe character set. I had mentioned that I already passed it via my Lithuan cousin who group up during Soviet times and is fluent in Russian, and that he ruled out Russian, Lithuanian, and an 'old Lithuanian' dialect he knows, as not being able to recognize anything.

However, a Russian works in the next room, so it's always worth a shot. He recognized not a single word. His guess: Greek. That's my guess also as that fits the geography of the story as I know it, it's the right area of the world, and I was guessing on some of the characters looking Greek. However, it's not modern Greek as we know it, I already went down this route, trying to pick out words, such as the date and plug them into online translators.

Next stop, my Dutch colleague works with a Greek colleague elsewhere in company J. The letter has been scanned and is en route via email to see if Greek colleague has any thoughts...