3 silver (plated) marks

I have 3 seperate items with silver marks that I would like to know more about.
Picture 1 : Aspereges spoon : markts: MB J+A......
Picture 2: serving plate : copy on paper of picture 3
Picture 3: serving plate : same as picture 2
Picture 4: teapot of Vandeputten (Brussels ?)

thanks in advance.

Best regard,
Aczz