Found last week on a deeply rutted field just after the potato crop was harvested, Didn't think it was silver till l got it home, it's got this rather attractive black patina, Should l clean it or leave it as it is ?. Oldsoapy...
I would think that the amount of black and how deep it is, would be evidence that it's real. If you take all that off, it would look like any of the fakes.
No, this one I would leave it just as is, maybe a sealant if there is such a thing.
Leave it as it is! That patina took 2,000 years to form, wouldn't want to mess it up by cleaning it, then you would have to wait another 2,000 years to fix the mistake.
I shine all my silver coins up with baking soda and a toothbrush. But those are my coins from the 30s - mid 60s and non key dates. That one my friend I would put in a protective holder like it sits. Beautiful like it is.
If toning was patchy or unattractive I might clean, but this is nice and even, all the detail is perfectly visible, and as such FAR more attractive than a shiny coin.