I am seeking your help to read the signature on this watercolor painting on behalf of a friend.
The painting is a study of Virgin Mary. Size 22 x 14 inches approx the, watercolor on card, painting is signed with initials middle right edge: M?? (I think other letters are P and G but not sure) and then bottom right corner a signature in full where I think I can read the first name "Marina" but then ... I am completely lost afterwards ....... Dated 1927.
Can someone figure out who the artist was please ...??