Looking through my collection of wheat pennies I found this one that I compared to the one on variety vista that matched pretty close. http://www.varietyvista.com/01a%20L...2PDDO002.htm Mine seems to be in an earlier state because it does not have as bold of a double 1 on the date, maybe I'm just overthinking it. Anyway, I always enjoy all your input, and would like it on this.
Good rule of thumb (especially as a beginner with older coins) is that if a coin has been around a while, all the die varieties you're likely to encounter are already known. Since doubled dies are an error on the die itself, every coin made by that die will display exactly the same error (not just some doubling that's sort of similar). If you find a coin from the 40s with doubling and it isn't exactly the doubling shown in a known die variety, it's almost certainly Machine Doubling.