German toymaker Josef (Joseph) Falk, an ex employee of Georges Carette, produced steam powered toys beginning in 1895, and took over the operations of Jean Schoenner circa 1912. The Falk trademark is an oval plaque with the initials JF flanking a tower over a “Made in Germany” banner.
Schoenner were taken over by Falk sometime before the Great War, about 1912. It is difficult to tell the products of the two apart, by this time both were focusing on rather unambitious stork-leg steam locos, fairly squat and long. All a long way from the British gauge III (Schoenner termed it 2b) and IV (Schoenner 3) locos they were making in the first years of the century, and the earlier high-stepping models made for the US market in the last quarter of the 19th. Schoenner were probably the first quantity maker to turn out true-to-type locos, starting with the gauge IV Prussian State Railway 4-4-0, which Bassett-Lowke marketed in 1900.
For more about Josef Falk, with illustrations, please refer to John’s Model Steam Engine Museum.