Ring of 1867 brought from the battle of Berlin WWII

[pinin]

Hello everybody! I have this ring bought by my grandfather when fights in WWII, in the battle of Berlin this ring was bought. I would like to know what these marks mean.


https://i.postimg.cc/qv9548kM/IMG-20210509-204413.jpg

[pinin]

[AG2012]

Hi,
It is 18 karat gold (18ct = .750 or 75% gold in the alloy).
The mark on the left is maker`s mark (A.A initials); its form is very suggestive of Austria.
The stone is most likely a brilliant cut diamond; they are always set in white gold (or at lest its setting) to avoid yellowish tint of yellow gold.
Regards

[AG2012]

The numbers on the left are irrelevant. Sometimes they indicate diamond carat size, but not here as far as I can decipher.

[pinin]

Thank hoy. What does 932.3 mean?

[AG2012]

Internal workshop numbers, inventory number, design or whatever not relevant.
03 in the end could be carat value (stone size of 0.30 carats) but just guessing; every jeweler will easily determine the size (its diameter should be 4.5 mm if it`s 0.30 carats).
regards