Need help with Silverplated Tray date & marks

[Alain]

Hello,
I looked on the web and in my book, but i cannot find information about the Hallmarks on this tray.It's 38 cm. in diameter .
Any idea about the age of this tray would be greatly appriciated to !

Thanks for your time,
Alain

[Alain]

I found the hallmarks later on this site!
The tray is from "Forbes Silver Co" U.S.A.
Now i like to find out aprox. how old my tray is...
It is decorated with Acanthus and shell's.