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Have you tried putting a piece of paper over it and rub it lightly with a pencil. Might be able to get more out of it.
I think it may be "LEONORE DOSKOW" - I found this ebay listing using the handmade sterling words and creative googling. And here is a bio about her too-
Leonore Doskow Handmade Sterling Silver Initial Brooch | eBay
Profile of Leonore Doskow '32