A Mint Sewn Bag Of 1974-D Error Cents?

I bought a mint sewn bag of '74-D Cents on ebay to search for errors. I was surprised to find what I first thought were adjustment strikes and not just a few, I'm talking all of them.

As I studied the coins I realized that they were not adjustments but heavily clashed dies that had been over polished to the point that central details in the portrait are missing. I have found 7 die pairs so far in the bag and all of them show the same thing, heavy die clash and lots of polishing to try to correct the problem.

The coins show where not only the different die pairs, but several have fingerprints from were they were inspected. Most of the coins show the area around the front of the neck with the tie and vest missing, no line for the neck and the "Y" in LIBERTY polished down to the point that it's about half the strength of the other letters.

Many of the coins are polished so that the hair above the forehead had no attachment to the face and the back of the neck has no sharp line to separate it from the field. Some of the coins are of the "Jailed Lincoln" variety and show the columns from the reverse.

They all have hundreds of tiny polish lines on the obverse and the portrait of Lincoln can be seen between the columns as well as the Y from liberty. They also seem to have die rotation of 5% to 20%.

I'm trying to sort out an document each die set, but it's a major project and I'm trying to move across the country in the next few months. I have one or 2 good photos of the most obvious errors so far, but I put the project on hold until after the move.

The reason I think that this is a Dump Bag for errors is backed up by the fact the is contained 5624 coins. You can find coins with new dies on one side with the error still showing on the other. It's just a weird bag of Cents.

My question is: has anyone ever seen a Sewn Mint Bag of Cents with this many coins? It's as if no counting was done, it was just filled to a point were the bag was full and sewn.

I bought 100 plastic tubes and started filling them and found that I had way too many coins in the bag. Also. only 48 coins would fit in each tube. if 50 coins were placed in the tube, they would extend above the edge and the cap couldn't catch the threads.

I found out in my research that '74-D Cents were known for heavy die clash and over-polished dies.

So, what do you think? Was this a bag used to dump errors? Why would it have an extra 12.5% of coins in the bag? And lastly why so many die pairs in one bag?

Thanks for any input. Here are a few photos. The rotation of the reverse is the same as shown in the photos.