The airline I fly for has over 20 737-200s, and the MTOWs vary between 114,500#, 115,500#, 117,000#, 117,500#, and 119,500#, with -9A powered machines (Basic & Advanced) certified at all the above weights. We used to have a -17A powered machine with a MTOW of 110,200#! It has been re-certified at 119,500#. I was told by our maintenance dept. that some of the limits are paper differences and some are due to differences in the Landing Gear and Brake assemblies.
