Found on a Meriden / New England Glass Company Wild Rose jam jar/pot.
"Meriden B Company" (a.k.a. "Meriden Britannia Company") was the company name, probably to distinguish it from the Meriden Silver Plate Company, also in Meriden, CT at about the same time. They didn't make glass, but they did make lids, holders, baskets for glass objects among other things silverplated. Both companies became part of International Silver.
