In the 1980s the legendary Northumbrian musician Foster Charlton gave me a Lachenal Anglo for use by my family ( I used to 'call' with his barn dance band). Both my son and I have played it ever since and it still plays beautifully. I suspect it comes from the factory when the family was still in charge ( possibly c 1871/2) with Elizabeth moving on in 1873. The Lachenal name is not on it but the number of the end is 90916 ( not 91606 as it looks from upside down - fortunately the 1 is clearly legible as being in the 90916 sequence). Am I correct about the dating and how rare is it to have such an instrument still tight and playing well?