Help with marks

[ctree1066]

Hi guys, can anyone help with these marks on a large oval serving platter, the item has been acid tested and shows low grade silver.

[dognose]

Hi,

Vincenz Carl Dub.

See: viewtopic.php?f=38&t=35107&p=92696&hilit=vcd#p92696

and: https://www.925-1000.com/Faustria_03.html

Trev.

[AG2012]

Hi,
It is not low grade silver although 12.5% less than sterling.
Austrian standard 4 for .800 (Toucan mark after 1922).
See here:
https://www.925-1000.com/Faustria_03.html

Regards