Hallmark on Art Nouveau ss frame

[vango]

Greetings I have a sterling frame (shown) and here is the hallmark. It is a geometric mark with rectangle connected to a circle and finally the diamond. marked 304
I am trying to place it in time as well as maker. thank you very much.





(admin photo edit)

[SteveDWollongong]

Hi Vango & welcome to the forum,

The maker is Dominick & Haff. Please see;

http://www.925-1000.com/americansilver_D.html
and
viewtopic.php?f=38&t=45974&hilit=dominick+%26amp%3B+Haff

Cheers,
Steve

[vango]

Thank you very much Steve. I sincerely appreciate your knowledge of hallmarks...and your diligence.