Austria-Hungary Unknown (Austrian?) hallmarks

[Carol I]

Can you please help me identify the markings below from a Romanian badge? Some Austrian jewellers did indeed make Romanian orders in the end of the 1800s and beginning of the 1900s, so it is worth asking the question here as well. Thanks.

"AF" hallmark

[Carol I]

I cannot make this one out

[Carol I]

Same as above but from a different angle

[Carol I]

Same as above, but rotated 180 degrees

[Carol I]

"A" hallmark

[Carol I]

One more image of the mark I could not make out

[Carol I]

These have been identified as Austrian hallmarks. "AF" is the mark of an unidentified maker, "A" is the Vienna city assay office mark and the third one is an Austrian mark for 0.750 silver. See Unknown hallmarks for details.