I've just purchased a Lachenal anglo from Chris Algar so you probably have the details of this already.
30 bone keys, metal ends, 6 fold bellows, steel reeds, number 149617. I've had a look inside as the typed number was incomplete. The only date I've found is 23/4/15 but as this is placed next to a modern sticker for Vintage Strings and Accordions in Cheltenham I think this marks a restoration date. To my untrained eye the only modern parts are the wrist straps and the pallets(?). From what I read above this would date to c1897?