P. Phillips - early 20C portrait of a man

This is an American miniature portrait on ivory from c.1930-40, in a typical metal frame of the time.

It is signed P. Phillips, which is not the name of a recognised artist. It is not readily discernible as on a photographic base, but that may be the medium, with Phillips as the name of the photographer, who then arranged for the hand colouring of the portrait. 

There was an American miniature painter, Josephine Phillips who was active in 1934-38, so she may have been a relative of the artist.

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