Hello everyone!
I didn't found any pics in my laptop about this romanian hallmark or item.
But there is a little schedule about the romanian hallmarks

I think, the shape of the hallmark and the strains in the hallmarks shows the age and the fineness of the item, the character "A" (and any other letter) rather shows some romanian assay office. But I didn't no the exact rules about the romanian hallmark system.
Best regards!
Krisztián