First go to Variety Vista and look to see if there are DD variations for this date and MM. This coin has some circulation wear and scratches and that can make it harder to see if it is a true DD or one of several types of worthless doubling. VV shows 2 obverse DDs for this date. Compare with yours. http://www.varietyvista.com/01b LC Doubled Dies Vol 2/DDO 1959-D.htm And 1 rev DD: http://www.varietyvista.com/01b LC Doubled Dies Vol 2/DDR 1959-D.htm The variety for the reverse only shows the C in CENT. Of course it's always possible that you could have a "discovery coin". But wouldn't it be more likely that someone else would have found the first DDR after 65 years. The varieties for the obverse seem to be on the date and on the L in LIBERTY. Your L appears to have been struck by something post mint.
There are a number of posts here with diagrams, to show you what to look for with DDs. And the different types of doubling there are. Try the search box.
Your coin has die deterioration, strike doubling, PMD and a lot of wear damage to a first-year Memorial cent. There is nothing remaining of value beyond face value. With the amount of wear, trying to confirm variety characteristics is almost impossible because the wear damage will have obscured die markers and minimized variety attributes if not totally obliterated them…imo…Spark
Yes, it is a die deterioration effect. but if a person does goes to VV or similar old listings, they will probably see such listed as a "Doubled die". I would only suggest Coppercoins.com as they seem to be the only help area that discarded the old crud and are quite accurate now. IMO of course. Jim