The back is perfect due to the coin sitting in its box but that side was facing up and is toning beautifully.
The Black is called "Gun Metal Grey" -- its a nice toning but better when deeper (ie 100yrs +) Adds authenticity and shows its in an original state (untampered) I love the Wabi Sabi asethic of a heavily toned / patinaed silver coin.. it is one aspect that makes silver so unqiue and very much something i love about silver. When buying Antique Silver.. understanding patina is vital.. cleaners of silver disturb me as its 100% in vein.. you waste your time and make the item look worse, it will tone back in a worse state.. you lose.. leave your silver alone and let it succumb to wabi sabi like it should!