My thanks for your information ref my lachenal concertina by using a better light and more powerful magnifying glass I can see there is another number almost hidden from veiw the full number is in fact 115604 just for the record is there any way I can get any more details just for myself. And if I needed to who get it repaired in the future who would be the best people to contact . Yours A Very happy man!!! bobbobs.