Airplane SKh-1 (LIG-10) / СХ-1 (ЛИГ-10) design by A.Bedunkovich, passed state tests in 1937-1938.
Ten years later, August 31, 1947 flew up the prototype of the future of An-2 designs O.Antonov (was based on the project №4).
It is interesting that at first he was designated as the CX-1.
That is, as well as the plane Bedunkovich, hence the confusion.
Drawing from magazin "Wings"