Thailand Black Coin - Coin Community Forum

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Author	Replies: 6 / Views: 1,283
Babar Valued Member Pakistan 207 Posts	Posted 09/24/2012 12:30 pm Hey all! I recently found a stash of old thai coins, but was disappointed when they all seemed so...dark. At first I thought it was damage, but now, most of the similar coins I find pictures of online are black as well. Here are 2 of the ones I found: Because of the darkness, I am not sure I'm even able to identify them correctly, but I assume it is this one: http://en.numista.com/catalogue/pieces12232.html So they are made of tin, does that darken with rust or something? Because while the coins were inside a leather satchel inside a steel trunk for at LEAST the last 30-40 years, the trunk was placed in a basement that got flooded at one point (most of the stuff inside the trunk remained undamaged, however). Notwithstanding any scratches or anything on the coins (the ones pictured are just one of many), does the dark colour reduce their worth or something as well? Report this Post to the Staff

allranger Pillar of the Community United States 1391 Posts	Posted 09/24/2012 1:12 pm The current trend in coin collecting is to keep the original surfaces. Toning doesn't damage the value. Some people even collect toned coins, or coins with personality. This is different than the older shiny is better mentality. If you ever get a coins from an older collection you see that a lot of them have been cleaned or dipped. The only thing I would worry about is the little bit of green gunk on the reverse. Could be verdigris or pcv damage. Report this Post to the Staff
daniels Pillar of the Community United States 1620 Posts	Posted 09/24/2012 3:41 pm That is a cool thai baht I was there last year doing some cool stuff with the army and what an amazing place I've never seen that coin before do you know the date on or the value in baht Report this Post to the Staff
daniels Pillar of the Community United States 1620 Posts	Posted 09/24/2012 3:43 pm i guess I should have read the link lol still cool Report this Post to the Staff
Babar Valued Member Pakistan 207 Posts	Posted 09/24/2012 3:54 pm Yeah, I can't really tell the dates just by looking at them, but the army dude (sorry I don't really know his name [:/] on the coin slowly gets older and older, so that helps . Kinda like the queen on lots of the English/Australian/Canadian currency. ..although I think his father(?) ruled before, so then it gets old again if you go too far back. He's got glasses now, and seems to go for the "distinguished" rather than "dashing" look . Again, I can't be totally sure because of the difficulty in reading, but I believe that coin there is 1946. Allranger, the stuff on the back is probably verdigris, if anything, because it wasn't stored in any PVC ever...although how verdigris could show up on a coin that has been closed in a satchel for the past couple of decades is confusing... Report this Post to the Staff
sel_69l Bedrock of the Community Australia 21788 Posts	Posted 09/24/2012 9:04 pm The trick with these tin coins is to try to find them in uncirculated, without any toning. They can be quite scarce without toning. Report this Post to the Staff
Sap Moderator Australia 16862 Posts	Posted 09/24/2012 9:08 pm Your coin is actually this one, a 25 satang dated 2489 in the Thai calendar, or AD 1946. The denomination-numerals are the two characters to the left of the garuda-bird. The king depicted here is actually the current king's elder brother, who died in mysterious circumstances in the year this coin was dated. I say "dated" rather than "struck" because thee coins were actually struck for a long time after the king's brother had died (1954-1964), all bearing the "1946" date. Quote: So they are made of tin, does that darken with rust or something? does the dark colour reduce their worth or something as well? This is indeed a tin coin, and tin coins do turn black after spending some time in circulation. The black colour is a layer of sulfides, oxides and organotin compounds formed from reacting with oil and sweat on human hands. Since it is a "natural" colour for tin coins to turn, it does not directly make any difference to the catalogue value of your coin, since any heavily circulated tin coin is going to turn the same dark colour. However, it does affect what the catalogue value actually is, since as a general rule, tin coins (and zinc coins, which similarly turn black in circulation) generally aren't worth much in low grades, because of the unappealing colour they turn. Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis Report this Post to the Staff
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