Grade An Emperor

After enlarging it as much as I could, and taking into consideration the less than favorible photo quality, it comes down as a MS 62 to 64 in my book. I'm giving it the benefit of the doubt.

Well you both would make good raw coin buyers
because it is not known widely that most 100 FF
crowned heads Napoleon III are uncirculated
We decided that the full cartwheel lustre meant
an MS coin

Blowing it up only gave jpeg boogies

I will wait till tomorrow to see wheather there are more
graders willing to give an opinion

On the reverse side at 3 and 4 o'clock there seems to be friction
This drops the coin down to MS62



Image: 1867 A Let b green ann 1.jpg
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So conclusion
This is probably an MS62 and Old Dan did a miracle beign correct
with such a lousy pic
As a result of the lousy pic the coin went for only 22% over melt wheareas the correct price would have been 50% over melt
But like I said I did not dare to bid

quote:

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Originally posted by Southern Yankee

Hey ageka, could you enlighten me on what you are talking about with the blue and green. I have not a clue about gold coins except that I would like to have some.

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One of the first things I had to do in professional life was to automate color matching
Like Mercedes would send a piece of leather and ask us to make a plastic in the exact same color
It was mostly done by hand and eye and took mostly mixing 5 to 7 colors and trying up to ten times before the colors would match
Then came along spectrophotometers and some matematic formulas three competing types like Cielab which ran on a huge PDP11/23 computer and would give the right color with only 3-4 pigments in only 3-4 trials
So I spend a week in Princeton New Jersey to learn color matching
and another 8 months to get the computer learning and running

Now I use an 8 year old photoscanner whose purpose in life was to turn colorphotos into digital photos and the program has a red a green and a blue balance ( I do not know what photoshop or any other program has )
If I move the blue balance to maximum setting I normally get a bluish coin showing all the strange things on gold ; like glue, fingerprints, scratches etc because yellow and blue contrast very well
This coin however refused to contrast so I had to twiddle blue and green to get the best contrast in green

It all comes back to the fact that our eyes only see contrast and then to augment the contrast in such a way we see the differences

However the sovereign had been glued in a book as way of fixing the sovereing to the page god knows when
This is very clearly seen by going all blue on the blue axis
Notice the orange liquid surfaces which are glue
( and only took 30 minutes in acetone to dissappear forever )



Image: Vicky glued blue.jpg
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The theory is that the human eye will only see a difference of 1 unit
as measured by a spectrophotometer and calculated by Cielab
That is not true because in oranje the human eye needs 4 units of difference ( that is why manipulating color on gold pays off )
On the other hand in gray the human eye may see difference as little as 0.1 unit
I presume the method I discribed will work perfectly on copper , messing and anything yellow to oranje
I presume that on silver the best would be to try lighter darker to the extreme and contrast up and down to the extreme to force gray differencies
If the silver was badly photographed so that it looks yellow like the first step would be to make it look like silver
My program as a function to show color in black and white

I edited because I typed Cieluv when I meant Cielab

I don't think tylenol will do it for that. Maybe more like darvocet. Thanks