The Schorrsiegel Affair (German: Die Sache mit Schorrsiegel) is a 1928 German silent film directed by Jaap Speyer that featured Bernhard Goetzke, Walter Rilla and Anita Dorris.
 It was adapted from a novel by Fred Andreas.
 The film's art direction was by Hans Jacoby.
The Doll of Luna Park (German: Die Puppe vom Lunapark) is a 1925 German silent drama film directed by Jaap Speyer and starring Alice Hechy, Walter Rilla and Fritz Rasp.
The Elegant Bunch (German:Elegantes Pack) is a 1925 German silent film directed by Jaap Speyer and starring Eugen Klöpfer, Mary Odette and Ralph Arthur Roberts.
A Kingdom For a Horse or Een Koninkrijk voor een huis is a 1949 Dutch comedy film directed by Jaap Speyer.
Jaap Speyer (1891–1952) was a Dutch film director.
 He was married to the German actress Mia Pankau.
The Tars or De Jantjes is a 1934 Dutch comedy film drama directed by Jaap Speyer.
The Morals of the Alley (German:Die Moral der Gasse) is a 1925 German silent film directed by Jaap Speyer and starring  Werner Krauss, Ernst Hofmann and Mary Odette.
Bigamy (German:Bigamie) is a 1927 German silent drama film directed by Jaap Speyer and starring Heinrich George, Maria Jacobini and Anita Dorris.
Moritz Makes his Fortune (German:Moritz macht sein Glück) is a 1931 German comedy film directed by Jaap Speyer and starring Sig Arno, Viktor Schwanneke and Willy Prager.
Herbert Blaché (5 October 1882 – 23 October 1953) was a British-born American film director, producer and screenwriter, born of a French mother.
 He directed 56 films between 1912 and 1929.

Question: Were Herbert Blaché and Jaap Speyer of the same nationality?
Answer: no