Silver Electrodeposition

It being a medal maybe this is normal? It appears a silver deposit has been placed over a debased alloy from the pictures. Also take a look at the German Thaler (Wildman Type) which appears copper maybe leaching through in this same auction. I discuss this form of counterfeiting in my new book and Gurney will also address this more fully in his up and coming Cap and Ray book. In other words is this medal silvered or is it suppose to be say a 90% silver alloy medal?

JPL

The oxidation and toning would be expected on a 150 year old item I would think. It looks like it hasn't been played with to me.

But then again, I'm no expert.

The coin sold for $ 164.50.

It is more of a commemorative than a medal since it has a denomination.

I do not see evidence of a plate over an off metal when I blow the picture up as large as possible. There is some possible copper leachate near the perimeter on the obverse. From recent reading I believe that is likely from a moist storage with exposure to something like Sulphur. It could be a suphate or carbonate hard to tell.

I would lean toward a likely corroded original based on the black to green patina, however, it should not be graded MS65 in my opinion.

This really needs a much closer look to rule out corrosion.

This is my coronation thaler. I believe it to be silver.