Mark on art nouveau sterling dresser jar

Can anyone decipher this mark on a sterling lid to a dresser jar? It is incompletely stamped, so not much to go. I looked through the 925 marks site at the W section, and also the initial section, but didn't see anything that looked like a match. Thanks for any thoughts.

 

You know, when I see this kind of classically Art Nouveau design I always think of Unger Brothers first. Not that the thought helped much in finding this specific lid or any way to make their mark out of the very partial impression, but I figured you should know that at least one person tried.

 

Thanks for looking, Bakers. I did look at the marks for Unger and Kerr to see if they might fit the partial mark I have. I was hoping someone might recognize the shape of the mark.