Anyone know Pratt Sterling mark?

The only thing I can find is for a Katherine Pratt. This doesn’t seem old enough to be hers. Is anyone familiar with her work or mark that can verify it for me or point me in a search direction? All I could find is a plate listed on ebay with the exact same mark attributed to her. Thanks for your help.

New poster, not sure if I’m doing the pics right. Bear with me if you can’t see them please.

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