Need help to identify this triangle mark

[RussianGirl]

Hello.
I need some help with my cake slicer's mark. (country, maker, anything...)
The mark is a triangle with something in it.

I found the spoons with the same (i think so) hallmark and the seller said: "handle backs have ARM & HAMMER hallmark". But unfortunatly, no "arm and hammer" mark i saw don't fit in with my mark.
Any help would be greatly appreciated.




And this photo of the spoon:

[Bahner]

Hello, see here

viewtopic.php?f=35&t=24286&p=58498&hilit=geist#p58498

Best wishes, Bahner

[RussianGirl]

This is it! Thank you so much