Was interested in the discussion regarding above mentioned concertina. I also have an english edeophone which I am trying to date. It looks almost identical to the one pictured. Serial # is 58892. Chris, your posting was really helpful, as your's has a serial number which is really close. My concertina was my late grandfother's and it has always been thought that he bought it new when he was 16 (ish). As he was born in 1907, the dates would jive. Could someone please explain to me what is meant by "bowing levers"