The accordion have had a text ‘Imperal’ on the grill.
Imperial accordions were made in Berlin, Germany from 1840 onwards. The owner of the company was J.F. Kable. The company manufactured both accordions and harmonicas, and its trademark was a double anchor. In 1912, Hohner bought Kable, but the company continued to operate as a separate company until 1929. Hohner has used Imperial as its brand name.