Post Different Coin Surfaces Here - Page 3

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Author	Replies: 38 / Views: 6,208	Page: of 3

nautilator Valued Member United States 330 Posts	Posted 10/15/2018 12:08 am Anybody seen a coin tone like this before? If so, I'd really like to know how this happens. I've pulled a few silver half dollars with this exact type of toning -- dull, heavy black obverse and thin, metallic reverse before, but this one is a clad dime. My best guess is that this was at the end of a roll with the obverse exposed. Report this Post to the Staff
nautilator Valued Member United States 330 Posts	Posted 10/29/2018 11:19 pm You've all doubtlessly seen clad coins with blackened surfaces. Someone I asked suggested they've been burnt, it's one of those things I've always thought was reasonable but wished for corroboration on. I just found that corroboration. (The Spokane Fire is likely the one that happened in 1889.) Report this Post to the Staff
1c5d7n5m Pillar of the Community Belgium 1185 Posts	Posted 12/27/2018 11:02 am Quote: How about sea water corrosion on shipwreck coins? this extremely rare half Ducaton from the Spanish Netherlands (Antwerp, Charles II 1684 - Delm.337 - R3) was recovered in 1981 from the VOC ship 't Vliegend Hert built in 1729 and shipwrecked in 1735 near the coast of Vlissingen, Zeeland 250 years of sea water was not kind to the coin, but still it is a great rare piece Report this Post to the Staff
nautilator Valued Member United States 330 Posts	Posted 12/27/2018 9:07 pm Shipwrecked coins are one of those things I've always wanted, but never gets high enough on the priorities list to actually buy. I visited the shop yesterday, and actually got some good news: the both of these are naturally toned. They've been toned by the sulfite that's in those tan paper coin envelopes. The silver round has a solid blue surface on the reverse, and the bronze has a real rainbow appearance to it. I had to tilt the coins to have a better image of how they look. Report this Post to the Staff
1c5d7n5m Pillar of the Community Belgium 1185 Posts	Posted 12/29/2018 09:06 am nautilator, the sulfur indeed reacts strongly with the silver; placing a silver untoned coin close to a boiled egg causes this too Quote: Shipwrecked coins are one of those things I've always wanted the interesting aspect of coins from official rescue of a shipwreck - like coins from officially documented hoard finds - is that it connects the coin to the original period when it circulated this is becoming more relevant in a period plagued by modern numismatic frauds (that become better every year) from China Report this Post to the Staff
jbuck Moderator United States 189053 Posts	Posted 12/30/2018 1:45 pm Quote: I visited the shop yesterday, and actually got some good news: the both of these are naturally toned. They've been toned by the sulfite that's in those tan paper coin envelopes. The silver round has a solid blue surface on the reverse, and the bronze has a real rainbow appearance to it. I had to tilt the coins to have a better image of how they look. Well done with the photos. The coins look great! Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
nautilator Valued Member United States 330 Posts	Posted 10/03/2019 9:06 pm This is what happens if you put your immaculate coins on a foam background to prevent movement/damage. A few decades and the foam breaks down and leaves a much worse looking pvc-style surface on whatever metal it is. Report this Post to the Staff
jbuck Moderator United States 189053 Posts	Posted 10/03/2019 11:58 pm Oh my! Coin Collector Since 1978 Avatar Old Avatar 7070 Eisenhower Australia Canada World CCF Members on eBay CCF eBay Search Engine Report this Post to the Staff
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