I recently picked up a blue/white Super XL automatic & am curious about it's age. My forum searches indicate that the old Homelites should have an 8 or 9 digit SN, however this one only has 7 digits. The metal plate shows the suffix of "AO" followed by the SN of "3176388". I also have an old blue C-5 that also has a 7-digit SN, with no suffix. Is there someplace I can look that might tell me the age of these saws? Both appeared to be in excellent physical condition when I picked them up as non-runners. The C-5 only needed a carb cleaning & the Super XL needed a fuel line replacement, and now both run great. I'm an old machinery nut and get a real thrill when I'm able to bring something back to life (especially on the cheap:biggrinbounce2.