This is a 1921 British Silver Florin. I'm not that great at grading, but you can see for yourself and maybe give me you opinion.
I have sent much better than that for melt before now I'm afraid to admit. UK grading would be "fair" or "good" at the very best.
According to the Standard Catalog of World Coins 1901-2000 its only worth melt value. Keep it anyway as a space filler in your album or folder.