Struck on captured Turkish cannons by Russian soldiers. More information can be seen here.
I decided to use Verdicare on all Sadagura coins to see what the result would be like. Turns out Verdicare is not too effective on gun metal alloy, possibly due to the tin content. However most of them showed some improvement.
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A scarce pattern issue which circulated. Verdicare took care of some of the junk in the pitted area. Overall appearance still looks the same.
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A rather scarce coin which rarely appears especially in decent condition. Verdicare took care of the small green patch which was on the cow's head. Overall appearance has improved.
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This is one coin Verdicare didn't quite like. Some improvement but not too great overall.
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Verdicare has slightly removed the greenish patina. Overall appearance still looks similar.
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There is nothing major with this coin. A quick test with Verdicare has improved it's patina.
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This is one coin I wanted to get rid of until I noticed this is a different variety from the other para - 3 dengi coin that I have. Overall appearance has improved.
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Removed the small speck of white spot under the letter "b" of kopek"b" otherwise there is not too much change.
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Thrown in a random example to see how this fared. Still improved the overall appearance however it's best not to get such low grade. But again, it doesn't hurt to experiment with low grade coins first.
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A scarce year. This was previously cleaned and then white spots appeared everywhere. Verdicare essentially took care of it which is good.
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This has verdigris forming in an unusual way. Was hoping to see if Verdicare can remove a fair amount of it but this didn't happen. Way too much damage. Could have just got rid of it but this happened to have the best edge out of all the coins that I have.
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Another low grade coin that I took for a test. The whitish specks are now gone which is a good thing. Just kept it as it had a neat crack feature on the top.
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This is a really, really scarce coin overstruck over a 1773 para - 2 kopek coin. This coin just do not appear often in any condition. May appear in major coin auction shows but it often goes for some silly figure. Verdigris were forming the banner "2 kopek" which is mostly removed. Overall appearance has improved.
10 March 2015