More of a case of the dies worn out thoroughly. You can see the edges of the numbers very weak. The die flow lines are almost as strong as scratches, The as far a a lot of pieces of metal moving around, they didn't give the appearance of the filled letters. The die just crumbled on those areas. Were there is no die to make the inside edges of the letters/numbers the die doesn't have the ability to make those curves. The planchet is no longer being shaped with those pieces broken of the die. For example if the center pin of the Die D mint mark is broken of, The die can no longer form on the coins a regular D. It comes out as a blob. Not because there is metal floating in side the die. But the ability of the die to make that inside part of the D is gone. On the inside of the 955 of the date, those areas are not filled with something, those areas are broken off. With out these devices edges, the planchet doesn't get formed in that area ever from that time forward with that die. Back then they used dies that went beyond real usefulness. Some error collectors think they have found something, but give me a Nice coin from a die that doesn't have distracting defects. Those will be the ones to search for. No cracks/gouges/bag marks/fantastic lust. Something you could have graded as a higher grade coin. Those are the more valuable in grades. You sometimes may find on in a roll/box/bin of coins that may reach that almost perfect coin. With new coins I sort them and save the best examples I can find. Then put the lesser ones back to work. I may find just a few out of rolls, but those few you find will be the one someone will collect/desire in time. It is always easier to sell a great coin than a filler coin. Sure both will sell, but how does the next collector view next his potential purchase. I bought a roll of coins once for a high dollar price. The reason? Every coin in that roll was the best examples of the coins from that year. All were MS-65 or higher. Can you image passing on coins that will truly valuable to the next collector that will cherish them. Rather than just saving rolls of coins that only one/two might be great examples. Imagine passing down the best ones to the collectors of the future. That would be what I would like to be known for. They may only cost you face now, but in 10's be the choicest examples for that period.