Mexican Revolution Gurrero 2 Peso Showing Gold

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Author	Replies: 7 / Views: 820
Westwood Arms Pillar of the Community United States 684 Posts	Posted 02/03/2022 2:12 pm GB 215 Amaya A-GO 159 obv IV, rev E 24.64 gms This coin has been my collection for a while. On the obverse towards the edge about 1 oclock between the x and I in Mexicana is an eighth inch square of gold. Not sure how deep it is, but it does not show through on the other side. These coins have gold content. The .300 on the coin means there is about 3/10s of a gram of gold per coin. Is it scarce for a these types to actually show color like this? Report this Post to the Staff

Spence Moderator United States 34397 Posts	Posted 02/03/2022 2:23 pm @west, while I don't know about the minting of this specific coin, it would surprise me if the gold and silver were separated in this very discrete way. Much more likely would be a more or less evenly homogenous alloy. I suspect that you are seeing surface staining, but you might confirm with XRF or other nondestructive elemental assessment techniques. "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
Earle42 Bedrock of the Community United States 10034 Posts	Posted 02/03/2022 4:16 pm How much squash could a Sasquatch squash if a Sasquatch would squash squash? Download and read: Grading the graders Costly TPG ineptitude and No FG Kennedy halves https://ln5.sync.com/dl/7ca91bdd0/w...i3b-rbj9fir2 Report this Post to the Staff
Westwood Arms Pillar of the Community United States 684 Posts	Posted 02/03/2022 9:14 pm Spence I tip my hat to anyone with specific knowledge of the metal refining techniques in the state of Guerrero during the Mexican revolution. The spot is gold, obvious in hand. I have had a gold mine (placer claim) in ID for the last 12 years. It is gold with some copper. May I reiterate, is gold showing in these coins scarce? Report this Post to the Staff
Spence Moderator United States 34397 Posts	Posted 02/03/2022 9:25 pm @west, until someone with more knowledge hops on and answers your question more directly, I can tell you that none of the examples on numsita or acsearch appear to have a discrete hunk of gold embedded within the silver coin as it sounds like you have there. On the other hand, several descriptions include the word "electrum", which again suggests a relatively homogenous alloy. I recognize that I'm not really answering your question, but I'm hopeful that one of our experts will hop on and educate us both! "If you climb a good tree, you get a push." -----Ghanaian proverb "The danger we all now face is distinguishing between what is authentic and what is performed." -----King Adz Report this Post to the Staff
january1may Pillar of the Community Russian Federation 5172 Posts	Posted 02/03/2022 9:37 pm Quote: I suspect that you are seeing surface staining Some day I'll post a pic of my Siberian kopek, where I also see what looks like flecks of gold (but I suspect it's just some kind of patina). The nominal alloy for Siberian copper was 99.2% copper, 0.79% silver, 0.01% gold (rounded a little from the original figures). How much gold (and silver) there really was in there I have no idea. Report this Post to the Staff
tdziemia Pillar of the Community United States 7936 Posts	Posted 02/04/2022 07:45 am I know nothing about these coins, though given the circumstances, one would guess that the conditions for making coins were not "normal" and higher levels of defects might be expected? I'm sure someone who knows more than me (which isn't saying much in this case ) can comment. To me the well-defined edges of the discolored area make it look like a delamination, at least in the photo. I'm sure the OP would have said so, though. Otherwise, I agree that electrum is usually homogeneous, but in the circumstances where these coins were made ...) Edited by tdziemia 02/04/2022 07:47 am Report this Post to the Staff
realeswatcher Pillar of the Community United States 1962 Posts	Posted 02/04/2022 2:58 pm Interesting example. I've never noticed these Guerrero pieces to have such defined improperly mixed alloy spots, but these later issues aren't my specialty. Certainly, though, that spot looks to be just that (not lamination or tone). Are you certain, though, that it's gold rather than a copper spot? Would be interesting to get an XRF zap directly on that spot. Report this Post to the Staff
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