Help with more info on MH and co hallmark

I was hoping I could get some more information on a MH and co sauce boat, I tried to get a clear picture of the hallmark but couldn’t so I found one online that is identical. The only thing different is the number underneath on mine is 1215M. Would love any information on age? I believe it is electroplated silver? What does the 1215M mean?
1441MH&COBIS.jpg

EPNS stands for electroplated nickel silver. Nickel silver is a base metal with no silver content so the only silver is a very thin layer on the surface. The manufacturer, MH&Co, is Martin Hall & Co of Sheffield. The numbers are most likely pattern numbers or some other form of internal factory ID and have no useful significane.