Liberty doesn't look doubled to you? If u look past all the gunk each letter seems to b offset to the left
If you think something is off, then please post what you see and try to take pictures as close to that area as possible. It doesn't look doubled, it just looks worn down from those pictures.
Assuming no mint mark (I can't really tell if there is one or was one), here's the doubled die for that year and it was the master hub so it should exist for quite a few quarters: http://doubleddie.com/2019705.html
Picture is too small to see anything. Plus all the dirt around the letters makes it a bit harder to tell if there's any doubling.