Here are some marks on a belgian jug.


I am not so familiar with belgian marks, could you confirm what I identified so far and identify the silvermith ? Many thanks.
a Janus head with a "2" in a square : silver 2e title (833,33), Blegium, 1832-69
B swith a pick in a square : Anvers, period ?
a greek warrior head : garantee, Belgium, 1832-69
NM in a lozenge (fond et couvercle) : silversmith ?