Antique Xylophone 1930s - wood

This is an antique wooden xylophone, unbranded measuring 72cm long by 59cm (max) wide and 10cm deep. It has the bars arranged like a piano keyboard with 18 "white keys" and 12 "black keys" covering 2.25 octaves from E to A. They are resting on a dark stained wooden frame with green felt and a string mechanism to keep them in place. All the bars are in good condition, some of the green felt has come unstuck. It comes with one beater and is perfectly playable. It is unbranded so the manufacturer and country are not known. It comes in a hard black case, judging by the style this would look like it is from the 1920's or 1930's.