Hallmark identification?

[size=150][size=18]Hello, I wonder if there is anybody out there who can please provide the identification of a hallmark on the back of a 18cm ladle I have recently acquired (please see photo attached). A little way up from the hallmark is an AI/A1 which I undestand means super quality silver plate? Though the ladle is very yellowed. I just need help with the main part as in close-up photo. Many thanks in advance.[/size]