I have a Remington Model 4 rolling block in 32 rimfire. I recently aquired a copy of the 1969 Frank de Haas book "Single Shot Rifles and Actions", which has a chapter on the Model 4. My serial number is in the 350,000 block. De Haas reports that the largest serial number he has seen is 355657, which is only about 300 higher than mine, so I assume that my rifle was one of the last produced in 1933. Does anyone have any more recent data on the serial number range of the Model 4?