The one they shown is a die state C. Have you checked other sites for reference? They might show some different die states.
As Pickin and Grinin states, knowing what die state your coin was coined at will help you with establishing the correct markers to identify your coin. Some sites have one die state...others may have 4 or more. Your pictures are too blurry to be useful to me. What we need are crisp shots. Too often, folks try to freehand their photos and use their fingers to find the optimal focal length. The trouble is...it's freehand. Hands shake.
I checked coppercoins, but they don't have rpm-017 listed. I did find a stage B picture, and it has a very noticeable die chip next to the T in CENT. (Seen here: https://www.coincommunity.com/forum/topic.asp?TOPIC_ID=327236) I don't think that this is a RPM-017. Any other suggestions?
Yeah, unfortunately I do not own a cell phone, so I have been doing this with an old camera. I have given the best photos I can.
I don't see a die chip on that coin at all. There is a small one in the lower C. I would do more investigating.
Generally speaking, you can get great shots with a camera. You need to employ the same tactics...but perhaps in a different plane. The key is steadying the camera in order to get the sharpest photos. I've used old quart sized soup containers from take out food to create a stand. The plastic diffused the light and I cut out a hole in the bottom of the container to get the clear shot. You may want to see what's in the cupboard...or perhaps the fridge.
It's hard for me to see splits and notches and to see what else is going on in the fields. Identify if its an RPM and then start the hunt for the markers relative to the die state your coin is in.
If I had to guess, it might be this: http://www.coppercoins.com/lincoln/diestate.php?date=1952&die_id=1952d1mm016&die_state=mds Your pictures are a bit too blurry.