Chainsaw Repair

I might put a little blurb about chain .In the 60's and 70's in this area all we had was chipper chain,I never saw even semi chisel until around late 70's and never saw chisel except that 1/4" stuff until the 90's .The later the only place you could buy it was a saw shop.
Other places,like TSC did not carry it .Of course today we have the internet and in a matter of minutes you can find about anything but it wasn't like that back  when.In the 60's nobody filed chains.You just hauled the dull ones to the saw shop which was also the farm equipment dealer or hardware store .I never filed a chain until the mid 70's,never knew you could .