Cook on one of these every day. Just wanted to let you know that you dont have to pump if you have an air compressor. Those tanks will hold alot of pressure. Just turn the screw out about 7 or so time and put your rubber tipped nozel dead center with the hole in the knob and squeeze the trigger. Start out with low pressure till you get used to doing it but you can get these stoves running as hot as a jet motor.
Most my stoves give the month number/ year, not month letter/ year. The one I do have is a 413 that has an N in place of 11. I wonder why some do it one way and some do it the other?