Hi, welcome to the forum.
Victorian Silver Christening Mug, see George Unite, Birmingham:
http://www.925-1000.com/dlBirmingham3.html#MThe date letter
b for 1876
I believe the decoration to be based upon an Spanish(Arabic) Pattern.
The inscription I believe read;
Ada Margaret Barwell as the Godmothers gift to sponsor and celebrate the baptism of Ena Barwell in 1876. I often pick the wrong Gothic! This could be helpful:

Cheers,
Oel.