You bet Evgeny! Actually I have been working on this all day, and dragged out every resource I have on hand.
While I could not find an exact match, I not reluctant to express my thoughts based on the information I could find. I enjoy researching from examples such as yours as it is a learning experience. If the 'experts' come in and correct my observations, then all the better
It would appear from info in Wagner (1967) that your saber (hiebmesser) is likely of German, E.European origin and likely 16th century by the form and character as seen in the images. This was of course a transitional period and diffusion of blades and styles moved in all directions regionally, especially with mercenary forces and colonization.
The curved blade with yelman such as yours is known in Bohemia in 16th c. but these type weapons were well known for burghers earlier. Hungary and Balkans were populated by Germans, so the German form would not be surprising with Moldava provenance as you note.
The pommel reminds me of the schiavona types though not the exact same and these are known to have come from Hungarian swords of these periods into Dalmatian regions.
With the marking, I went through everything, Lenciewicz, Gyngell, Kinman, Gardner, Wagner, etc. and no EXACT match. However I found comparisons similar in styling with joined geometric designs, in a sigil like fashion, and the split foot (tails) is apparently used in Milan situated marks. Otherwise the design resembles early Passau type markings of 1520s-60s.
It is tempting to consider this sword may be of S. German origin to East Europe of 16th century, with character of earlier straight blade swords (Oakeshott type III) in the hilt with a curved blade favored in E. Europe.
The use of blade inscriptions is fascinating and it would be good to make this one out. I wonder if your mark may have been latten filled.
The marking may be a sundry example which may have incorporated any of the elements of others circulating in these times, and possibly by armorers outfitting mercenary forces in Passau for one. These and other regional locations had blades, swords and other arms from makers in Solingen and Styrian sources which remain unrecorded as far as markings in many cases.
Sorry unable to find a match, but I think the rest of the detail is somewhat plausible as far as the sword overall. Authentication is of course best determined with hands on examination and analysis.
Looks like a great piece !!!