Earrings of malachite and silver, maker MP, possibly Navajo

[jsandsmark]

I've been trying to track down who this MP could possibly be and one name I've found is Margaret Platero. I don't know when she was working, as these were most likely purchased between 1930-1960.

Here are the earrings:



And here is the mark:



Any help would be appreciated.

-- Joanna
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