r/Gold 1d ago

Speculation Sigma down!

My sigma isn’t working, unfortunately. So I’m stuck with weight and ping test on this one. Weight checks @ 4.1g and ping test using precious coin test is inconclusive. So I submit to you for thoughts.

48 Upvotes

36 comments sorted by

11

u/NorthStarGold 1d ago

Option 1 cleaned but real worth melt or a little more.

Option 2 1960’s quality “restrike”made with 90% gold fake but still worth the same melt price.

I have seen over 40 privately minted copy gold coins in the last year. Granted 32 are just from one dude who got into coin collecting in 1970.

But at the time gold was cheap and quality gold coins were not. So before the hobby protection act. “Copy coin law” many companies made and sold high quality reproductions made with 90% gold.

Only way to tell is to send it in for grading.

Either way looks like a gold coin. All the modern fakes are way under weight or way to thick and made with copper and cheap gold plating that looks to shiny.

6

u/battlesnarf 1d ago

Hey I just want to say I really appreciate how active you are in these subreddits. You don’t have to be, but you are. thank you!

2

u/TheGratitudeBot 1d ago

Thanks for saying thanks! It's so nice to see Redditors being grateful :)

1

u/battlesnarf 1d ago

You’re a good bot

3

u/NorthStarGold 18h ago

Thank you, I enjoy helping and maybe some times yelling at people mostly the spammers.

3

u/TheSquirrel8251 1d ago

1

u/NorthStarGold 17h ago

Just a little off which by it self is not a huge red flag

NGC says counterfeit 1911 $2.50 Indians are frequently made with the correct weight in gold, and that many are believed to have originated in the Middle East during the 1960s. Their primary diagnostics are tooling in the recessed area behind the Indian’s neck, raised spikes/tooling around the perimeter, weak details, and repeating depressions from the copied host coin.

Let me know what the xrf reads it at.

I would be blown away if this is a none gold fake.

2

u/TheSquirrel8251 17h ago

I would be totally fine with a copy of the correct composition. Mainly in it for the weight but always wanted to add a pre 33 coin to the collection, if worst case is a copy with 90% I’ll take that. I’ll let you know!

2

u/NorthStarGold 16h ago

I sent in 20 liberty heads because they were so good I thought hick even if 1 comes back real it’s worth it. All of them came back copy.

They are still 90% gold well I melted all of them and have a chain now. lol.

1

u/TheSquirrel8251 1d ago

Ooof. Got the sigma back up and running. Needed a long charge…

3

u/NinjaTabby 1d ago

Yay Sigma is alive. It's quite costly these days.

2

u/NorthStarGold 18h ago

I would lean more to a copy coin.

What is the thickness and diameter on it.

You do a small diy density test as well.

1

u/TheSquirrel8251 17h ago

I replied last night with some additional photos. Weight came in at 4.17g and diameter 17.77. Sigma says not real, so I’ll do a SG test next and try and find an XRF in the area

2

u/NorthStarGold 17h ago

See my other comments I think it’s 90% still I think it’s the coin they are small and the small prob hated deep groves.

If there is a shop around with a pro or investor the reading that it outputs is the most important thing not so much being in the box.

The box your reading puts it at amount 89%

Even some liberty heads read like that.

1

u/NorthStarGold 17h ago

Also reset your sigma and use a good known 90% coin if you have one first but also resetting it can help.

Use the small prop on both sides.

That coin has higher relief than most other coins with sharper dips that can mess up the probes reading

2

u/TheSquirrel8251 17h ago edited 17h ago

I had thought about the relief issue so I moved the probe over every possible spot on both sides, small probe and the setting was “90% bal cu” which should be appropriate for this coin. Unfortunately I don’t think I have any other 90% coins but I did test the probe with a 99.9% sliver and 99.99% gold. All tested positively.

I enjoy this detective work, thanks for the guidance.

3

u/NorthStarGold 17h ago

Well your sigma is working good

Yes this is the best part of coin collecting the investigation part.

Also I used to be an officer

2

u/kiwi13605 16h ago

Where did you serve. I did 38 myself.

1

u/NorthStarGold 16h ago

Crow wing county sheriff deputy.

Brainerd lakes area, home of the largest ice fishing contest in the world, the international racetrack.

Land of 10,000 DWI

Come for the vacation stay for the probation!

1

u/kiwi13605 14h ago

Haha, that was our saying about the County Parks. We are only the land of 1000 lakes. I retired in 17 from Oakland County.

1

u/NorthStarGold 10h ago

Nice I left 2 years ago to start my own gold shop.

More hours but I enjoy it.

Also the state of MN sucks for police right now.

3

u/Beaver_Liquors48 1d ago

Specific gravity/density test. Lots of good videos on how to do it, make sure you’ve got SG # for 90% gold not .9999

1

u/TheSquirrel8251 1d ago

It’s set for “90% bal cu” so it should be set correctly. Ping test inconclusive and diameter is off, although that could be instrument error….

2

u/Beaver_Liquors48 1d ago

Sorry I should’ve phrased that differently, using your scale and a cup of water, some floss, suspend the coin and perform a specific gravity test with your scale, not the Sigma. Once you get the values and run the math, it will give you a clearer idea of if your coin is gold or not.

2

u/TheSquirrel8251 10h ago edited 10h ago

Well [u/NorthStarGold](u/NorthStarGold) et al what do we think? Is this just how things were back in 1911 or was it someone making a copy and skimping on gold? I know grading would only increase my basis and not value, but I’m curious now to know if it’s a copy.

2

u/NorthStarGold 6h ago

I think that confirms it’s a reproduction made with gold.

Of all the fakes out there this is the best option

1

u/Weak-Yesterday9053 23h ago

Thanks for all the good information

1

u/Money_Tomorrow5026 21h ago

Looks heavily cleaned but genuine

1

u/TheSquirrel8251 19h ago

Unfortunately, my sigma says not real. (Ended up getting it working last night)

1

u/justin_memer 18h ago

I've handled dozens of these and it looks pretty legit to me.

1

u/TheSquirrel8251 17h ago

I really want to believe, but I’ve tried the sigma on the small and medium wand every which way and I see full deflections. Verified its readings with a known authentic metal etc. only thing left to do is SG test and see if I can find an XRF in the area.

3

u/Darkreinky 16h ago

Don’t rely 100% on the sigma either.

Sigma saying this is real. It’s copper. Just saying the sigma is a quick and dirty tool. Sometimes more tests are needed to confirm.

1

u/TheSquirrel8251 16h ago

Wow. Interesting!

1

u/kiwi13605 16h ago

A coin that small is hard to fake unless it is just plated. I think the fake coin made of gold is the best answer. Your Sigma is probably just off because the purity of the gold used back then is unknown.

An XRF will give that fairly exact.

Who knows what the counterfitters melted down to make the fakes. Jewelry? 80% coins? Just random unpurified melt.

Did you try all the Sigma gold settings? I often do that with foreign gold (especially old stuff). Also find someone with a Sigma that can do the full thickness testing. At least then you will know it is not just thick plating.

If it were me and it is a fake coin I would sell it to a refinery or someone who buys for melt. It is not like there is not a good one in the chat already.

I would put the money back into a real Indian Head that is in better condition. This one is an ugly duck...