It's not referring to the coin, but the slab. When PCGS promotes a new style of slab for coins they will do a run of 'Sample' labeled slabs for people to examine. I think they are distributed at coin shows.
They can be quite collectable and I would think a 1943 cent would be a good one to have.
As far as I know, such slab are distributed at coin shows, the company makes them so that dealers can study the new product of TPG companies. They seem to be free, but they can often be seen at dealers who sell them at a low price.
I understand now. Thank you for the answers. The coin is in beautiful condition but not graded. I'm going to run home real quick and take a picture and post it. Would it make sense to send it off to have it graded or is this one of those instances that keeping it in the sample slab is better for the protection of the coin and how unique it is? I literally searched for hours and only found 1 other coin that was like the one I have. Give me about 20 minutes and I'll have a picture up so you can see what I see.
I feel that the appeal of this coin is that it's in a Sample Slab. For a 1943-S cent to warrant certification it would need to be at least an MS-67. It's hard to tell the grade from this image but I would guess that it's not up to that level.
The 'No Grade Code' of 80 would appear to be used for Sample Slabs.
I'd keep it as is. If you want or need a graded example you can find them without much effort. They sell for $100 or less for a Mint State 67 example.
Nice coin in an interesting slab! Thanks for posting!