Nice , I've got a very similar coin. A 1942 florin with a small clip. Your blakesly shows well, I'll try to get a good shot of mine.
Not sure if can help, I have a 41 half crown with something going on which the rim. I'd normally pass this off as damage but it is the only blemish on the entire coin. Let me know if it's ok to show if you think you can help, I don't wanna hijack your post.
Right, I just realized that and was typing my redaction as this post came thru. My bad, I'll give ahead and do a thread on it, it's nothing I've seen before I don't believe