This won't ever happen, but I wish it could happen. When someone posts a coin for GTG we are usually very close to another. One grade is usually the prodominant with some one grade above or below the prodominant. I wish a coin would go to say NGC first and be graded by someone , then send back in to be graded again by a different grader without knowing it has already been graded. Keep repeating until all the graders assigned a grade to the same coin without anyone but the big boss aware of what is happening. Then repeat the process at PCGS, ANACS, and then ICG with the same coin. As everyone is aware a difference of one to two grades can make a big diffference in value on many coins. I think I would pick a Morgan or Peace Dollar to do this with. I wonder if some graders would show a tendency to be one grade above or below the predominant grade if this was repeated for a total of five coins. Maybe I have too much time on my hands today. Maybe I should do a poll on my free time today.
I forget the process but most coins are graded by one or more depending on the year and type then off to the higherup's. Until it gets to the finalizer. Someone please correct me if I am wrong.
You should be the first. Pick a coin, and spend the year sending it to the big 4, cracking it out, repeat, and post your results next February 2.
I had a friend that was a senior grader and he said that the initial grader for every coin is 14 secs or less, recorded, then passed along to the next to grade. It goes through 3 sets of eyes to agree/disagree on grade for those 60 or less. This was about 6-7 years ago at PCGS.
Doing what you are proposing is only really feasible as a quality control measure funded by the TPGs themselves as it provides no financial benefit to the submitter. As close as I can get is my own submission of a conditional rarity 5 times across the different TPGs. I have a 1944-P Jefferson Nickel that I purchased over a decade ago that was originally housed in an old "no line fatty" NGC holder from the 90s that predated the 5 full step designation. Unfortunately, I lost most of my photos last year when my computer blew up so I can't show the progression of the grading from slab to slab completely, but here is the grading progression for my 1944-P Jefferson Nickel shown below. NGC MS67 OH 504077-030 (1990s) NGC MS66 4730261-014 (2019) PCGS MS66 45611991 (2020) ANACS MS65 7462702 (1/2023) NGC MS67 6528633-021 (5/2023) This coin has been graded 5 times by 3 different grading companies with a spread of 2 grades. The ANACS grade is perplexing as were most of the other grades from that submission. The other grades all make sense as I view the coin a high end MS66 or low end MS67. The steps are much better than they appear in the photo, and it seems that the small bridge of the 4th step under the 2nd pillar is the culprit. That diagonal mark to the left of that doesn't even appear in hand. There are many people who think a coin has a correct grade. It is only after playing the crackout/resubmit game that one truly learns about the subjectivity of the grading process. How can the same coin have a different grade at different times and both grades be correct? Because the grade is the subjective opinion of the grader who viewed that coin at that time. A grader who covets eye appeal and luster is much more likely to award a premium gem grade to a toned lusterbomb Morgan Dollar with typical MS65 surfaces than a grader who leans towards technical grading and views surface preservation as grade limiting. And despite the TPGs efforts to teach their graders to follow the TPG standards, the individual biases of each grader will inevitably affect their assigned grades.
This was done a decades ago, and the results show how wide the variations in grades can be. The trouble is grading fees and shipping have made such a game very expensive and time consuming. It can take 6 months to get a grade now. Here is a story a dealer, who is no longer with us, told me 20 years ago. He had Proof Morgan Dollar which he thought was undergraded. I don't remember the exact number, but let's say PR-64. He cracked it out and sent it in. He got an PR-63. He cracked it out and re-submitted it. That time he got back an MS-64 P-L! That grade was a financial disaster for him. He cracked out a fourth time, and it came back PR-64, which was where he started.
I like your nickel. I have a few of the WWII time nickels, but they are all graded MS65 - MS66 by NGC>