Unknown Anonymus : Flohwalzer (Flea Waltz)

The Flea Waltz (Der Flohwalzer in German) is a simple piano piece, often one of the first learned:
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It is known all over the world. According to an article by Hiromi Oketani in the Osaka Shoin Women's College Annual for 1994, it is known in Japan as Neko Funjatta (I Stepped on the Cat), in Spain as La Chocolatera, in the Netherlands as Vlooienmars (Flea March), in Belgium as Valse des Puces (Flea Waltz), in Russia as Sobachiy Val's (Dog Waltz), in Poland as Kotlety (Cutlettes) in Bulgaria as Koteshki Marsh (Cat March), in Hungary as Szam¨¢rindul¨® (Donkey March), in Majorca as Polca de los Tontos (Fools' Polka), and in Denmark as Prinsesse Toben (Princess Two-Legs). In Mexico it is called Los Changuitos (The Little Monkeys) and in Finland Kissanpolkka (Cat Polka). In China it is called ¡°Ð¡Íµ½øÐÐÇú¡± (Thief March). In the UK it is called "Chopsticks".
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The piece is in the key of F-sharp or G-flat. Most of its notes are played on black keys.
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While the German name suggests a waltz, the piece is not a waltz, since it has 2/4 time signature. The time signature of a waltz is always 3/4. The 2/4 time signature suggests a polka, but it can also be played as a march.
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The composer is unknown. A book by Eric Baumann attributes the piece to Ferdinand Loh, but this is obviously a joke (F. Loh = Floh¡ª¡°flea¡± in German).
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An elaborate variation on this piece, ¡°Lesson One,¡± was a hit in 1962 for Russ Conway.