Production of the 5200 was between 1975-80 and carried on from 1980-84 as the 5400. A long lived saw that had some real diehard users commercially. That nostalgia can be seen in collectors now for these saws. It is the largest displacement for the large frame chassis encompassing the 4200, 4400, 4900, 5200, and 5400.  The Poulan "Weed Eater Corp." carried it through the end of 1984 as the 8500.  The smaller frame series encompass 3400,3700, and 4000.  Running one is a blast.  The early style of low end torque and the RPM's that weren't really seen in most saws made this a great balanced saw that had plenty of torque and the RPM's to pull a bit over size bar or out right cut with a smaller size bar!