Composition 1927 (both)
Both these works are only known from photographs taken by Harry Holtzman who befriended Mondrian in Paris, organised and paid for his move to New York in 1940 and, incidentally, inherited most of his estate. The photographs are in the Holtzman Deposit at Yale, but a request for better copies of the full images have been ignored.
There is no information on the size of the works.
B180 Composition, 1926
B181 Composition, 1926