Don't forget the Young Head and there are some variations in date width, however I'm not sure these would really qualify as a variety.
As for proofs, I remain unconvinced, as early strikes with good preservation are akin to a "prooflike" appearance.
Given the existence of commemorative sets for 1887, it wouldn't be out of the realms of possibiility, however I am yest to see anything that thoroughly convinces me for the common shillling.
there are certainly other 1887 coins which would meet the criteria, so I am keeping an open mind and watching carefully.
I wish I had the time and nearby location so that I could hear it all!!
She's a lucky young lady,
Attached for the fun of it are some pics of my most photogenic shillings (a,b and c), however they were unfortunately mistreated before arriving with me.