Got this unattributed florin yesterday at my local LCS store from their junk silver bucket (They had several other late 1800s British silver coins too)

This morning, I looked at this coin, and it appears as if this is an impaired proof when I looked at both the pattern and circulation strikes. I saw all of the diagnostics on this coin, and they seem to match the pattern, the 8 beads on the crown, the pendant long link (though mine appears to have die polish in that area...), and I clearly see the IEB initials at the neck.
