I have just acquired a Wheatstone 32 key Linota Anglo instrument dating from 1920. From the Wheatstone Ledgers (SD01, 1919 - 1920, p. 140) I have found that 43 is written just before the Serial Number (28487). Both ends have this written internally, adjacent to the stamped matching Serial Numbers. I have attached a photo.
I assume that the 43 is a production number, but having read about model numbers on the forum here I would like to determine how this instrument is designated. After searching through the ledgers am I correct in thinking that the 32 key model first appeared in 1919? - I cannot find any earlier references to a 32 key being sold.
It needs some work; valves, grommets and attention to reeds, etc. but I think it will be nice once fettled.
Any insights would be appreciated.