round chased dish, 3 ball footed, floral, pie crust edge

i have tried to find these markings but to no avail. i have always been told it was silver but the hallmarks look some how similar to silver plate, but i cant confirm that. i would like to know if this dish is silver or plate. maker anything else one could add would be appreciated, thank you in advance for your help.
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it’s silver plate… ok