If it's any consolation, I've got 40-45 of the "Old Girls", I've converted quite a few of them to 3/8" lo pro, electronic ignition and I love running them. They are just unstoppable little work horses! If you ever find that you need parts, give me a holler. They run really good with a 14" B&C, as well. I've looked everywhere for info about telling their age, but to no avail, I read somewhere that they started around '72-'79, so they're still younger than me. LOL! I even went on a crusade to find cases for them, that was a great journey across the US, hitting garage/yard sales, and actually found quite a few. The only negative is that they don't have a chain brake, but I use them out in the open so that doesn't matter to me, at all!