Pixie’s initials can be seen in the lower left corner and the similarity to several of her cards is apparent.
The poster is from 1915. Pixie was a friend of the Honorary Secretary of this Fund, Miss Laurence Alma Tadema (daughter of the artist).
The reproduction is 10.5″ x 16.5″ and printed on 100 lb. glossy stock—suitable for framing.
Thanks to Holly Voley for telling me about this at BATS.