A rare vintage stone building set by Münchener-Spielwarenfabrik Gmbh

A rare vintage stone building set by Münchener-Spielwarenfabrik Gmbh - Münchener Bauspiele; ca. 1920 - 1930; the original wooden box with sliding lid (Schuberdeckel-Kasten), pasted with game scene for house building; various coloured painted stone building elements of different shapes and two painted cardboard elements (belonging? ), 6 sheets of paper with architectural patterns to copy; consisting of 31 building blocks and two cardboard elements; not complete; not checked for completeness; Caution - Not suitable for children under 36 months, choking hazard due to small parts which may be swallowed; signs of wear commensurate with age (see photos); Dimensions: approx. 14.5 x 20.5 cm