I have shown this one before. 1941 S/S. FS 502, it is a match to the CPG and the example in PCGS (well, before they changed things up on the website). If I ever decide to make a submission to a TPG, this will be one of the coins sent.
Funny story - I used to own that coin. I sold it many, many years ago when I needed the money for something else, and because it didn't fit my collecting goals at the time. There are very few coins I regret selling, but that is one of them. Here are some significantly better pictures of that coin, taken by @robec . Feel free to download and use them for yourself in the future.
Here’s a three pack of FSBs that just came to me as part of a large collection purchase. Would love grade input as I’m unfamiliar with the nuances of the type. They are still in flips but the luster is there.