A friend just gave me that bookmark without knowing his origin.

After some research I identified some hallmarks (tell me if i'm wrong) :

Maker's mark : SM &Co (Sampson Mordan and Co)
Silver mark : Lion passant (sterling silver 925)
City mark : Chester
Date letter : K for year 1910 .
There is a last mark I cannot identify : a kind of fir with the letters MA.
I don't think is a duty or import mark.
Anyone got an idea ?
Thanks you.