i have an older small model stihl and the only # is on the bottom of the handle,but it is the same # that is on a completely different tool (my buddy's farm boss 029) both have the # 311 on handle.....i tried looking it up for the heck of it and searched images,but couldn't find the model i have...i was able to get some #'s from the bar,which i think is original....#'s on bar are FJ305 & 5813, with a carlton/tiger chain # K3....if i can, i will upload a picture of the saw....i think i got a pretty good deal with this lil screamer ( $75.00) and would love to know what it is and when it was made....and if i did really get a good deal