Does Anyone Have A Sigma Metalytics?

Dealing mainly with sovereign gold and silver coins, I always weigh and measure diameter and width of loose coins and occasionally test gravity. Since I started buying slabbed (NGC & PCGS) coins, I did invest in a Sigma. Ive seen enough fake slabbed coins out there. This is where the Sigma shines as it can see right through the slab. I also like the large bullion wand to test larger bars for anomalies within the bar. All in all, I think it was a great investment and I use it daily. I like that its portable and I can carry along with me to new shops, estate and private sales to quickly determine authenticity.

At auction today I tested a US 1867 silver dollar with my Sigma on the pre1900 90% setting. The coin was perfectly within the brackets, despite it being an obvious fake. The coin had that weird grey finish you see on Chinese Morgans, and the '1867' date on the coin looked a bit mangled.



It was paired with an 1885CC Morgan that tested just outside the brackets on the pre1900 setting, and way outside on the pre1945.

It's possible the 1867 dollar just had a modified date, but the fact that it was alongside an 1885CC and the two coins had perfectly matching looks and wear made me suspicious. Both coins were in flips so can't really be verified by weight or ping, but the fact that the Sigma said the 1867 is all good is a bit scary.

Always use multiple ways to verify your coin.

Does any one have any spare wands for the sigma origional as mine did not come with any , so I've been using the measure feature for 1.10 and 1/20 to determine authenticity of the small .9999 gold coins