I have renovated what I think is a 9A but a couple of mysteries have arisen. The bed serial number has the letters NCR which I believe is for a standard gearbox. My lathe has a quick change gearbox and the plate says it has a 31/2 foot bed. My bed is only 36” and there are only 2 screws holding the QCG in place in the bed instead of the usual 3. I am in Australia and do not know the history of the machine at all but am wondering if putting upgraded equipment on a bed was a norm for 1952. The name W.B. Rapp Philidelphia is on the drive train cover and maybe they did the change? Would love to hear your opinions.