Hi,
I think there is ``84`` standard on top in very stylized Farsi (Iranian,Persian) alphabet.Number 4 is distinctively different from Arabic,therefore the origin of items is modern Iran.
As for 84, it stands for one of official standards in Iran and indicates 84% silver alloy or 840 in millesimal units.The other standard,less common is .900.
Persian 84 related to Russian zolotniki (.875) is a myth.The standard was probably used in northern part of iran during Russian - British division of the country for a short time, but that ended 100 years ago.Later production in .840 fineness is marked as such, e.g. "Made in Iran, 84% MARTIN "
(Pay attention to percentage).
In a word,it is modern Iran,solid silver .840.
There was a discussion and examples of Iranian 84 standard;see here:
viewtopic.php?t=53318
Regards