mark identification on pocket watch

[h123]

if you would help if this watch is gold and if gold what Karat .Thank you.

[AG2012]

Hi,
Austria-Hungary Empire import mark for gold after 1902.
There is a small letter on the left indicating assay office, A for Vienna, B for Budapest etc.
The same for 14 K and 18 K as far as I have seen.
Regards