1953 D - Penny

Not sure on the D but someone will be along
shortly I'm sure to help out. If you could get as good a pic.
on those two other 1920 coins that you posted, as you did on this D
MM one they could probably be identified much easier.

Either I'm too far or too close to you images to see what is going on. On good coin images you should include the date area and mint mark area in the same image. If you can't see the possible variety in the same image of a RPM, then it to minor to list. But as your images are, we still can't tell anything. Try making them to include as posted below.
https://www.coincommunity.com/forum...3D1MM001.jpg
https://www.coincommunity.com/forum..._1MM_008.jpg
https://www.coincommunity.com/forum...d1mm011l.jpg
https://www.coincommunity.com/forum...d1mm012m.jpg
https://www.coincommunity.com/forum...h___East.jpg
https://www.coincommunity.com/forum...M_002MDS.jpg
https://www.coincommunity.com/forum..._RPM_3MM.jpg
https://www.coincommunity.com/forum...PM_17_MM.jpg
If you have a RPM three factors need to be considered. S-L-M. In that order S stands for separation of the punches. (Direction N/E/W/S NE/NW/SE/SW and how much separation. These are needed to be considered first. Separation: How much and which way. Then the next step. Location. Where does the mint marks fall on your example. Beings that these are hand punched to the completed die, then the location need to be considered as most hand punching vary in punches locations and separation from punchings. If there is no separation, then it is just a regular coin make from a normal die. Beings all coins struck from this die will have the same variety, they will be able to be identified to a certain die or if there can't be matched to a known die it may be a new discovery or it too minor to list. The third thing to consider is Markers. (Last because the same striking problems happen to all dies and the markers are results of this normal striking breakdowns.) Clashes/cleanings/polishing/die cracks/chips/breaks/die fatigue/gouges. All of these things happen over and over, so looking at markers first to identify a die number is pointless. Markers are used to confirm die states of known die numbers. If a marker matches a die state for a variety, the it confirms that it is that die number, but just because the markers aren't present doesn't disqualify a die. Markers like a die crack on a column # 12 is not a good one. After most dies get into later die states most coins will exhibit this weakness on that column. so to search backwards for die markers are just like putting on you over clothes before your undergarments. So images are keys for identifying what three things? S-L-M. Separation of the RPM/dd dies need to be considered first. Then location for RPMs as they are hand punched on pre 1990 coins with a mint mark. Finally markers are used to identify die states. Images should show separation/location on RPMs Numbers of the date and the location of the mint mark of your coin. I usually keep my image size in the 600-800 pixel range and this keep the screen image maximized and the screen doesn't have to be scrolled across to read post.