It’s easy to know one thing about the MMF studio rugs. If they have just MMF in the lower left hand corner, they were woven before 1941, when Märta died; if they have AB MMF, they were woven by the studio after she died. These then were either her earlier designs, which continued to be made, or the designs of others employed by the MMF studio.
Below are some examples. First is a detail of a pre-1941 design; second is a post-1941 manufacture of an earlier design. I’ll discuss the design of these rugs themselves in another post.
(Images courtesy of Hakimian Carpets, NYC; first shown is stock #22116 ; second shown is#22117).