Hi Dowright, can you help me? I have what I believe to be a Lachenal Anglo with a serial number of 181530. It belonged to my parents, who got married in 1931. It came to me in the 1940's. Where they obtained it I do not know. It has 21 ebony buttons, a 5 section bellows, a rosewood fret and its only mark other than the serial number is a stamp saying steel reeds. It has stayed unlooked at for decades, but recently my daughter recovered it from my loft, where we found it rattled. I have now dismantled one end, only to find a reed floating free. All of the buttons work, except the 21st one which just seems to be a bellows release. (the 21st. button is on the other end to the one I took off).There are no empty chambers, so the reed is a mystery. The machine has never been touched , repaired or adjusted for at least 70 years. Uncovering the reed section showed no markings of any sort. The reed measures 40mm so appears to be a bass one.