I came across the Pocket Pinger on last night, and found it quite interesting. The inventor (?) claims you are able to detect real vs fake by using this device. Check out the website link below, he shows a demonstration of the product: Coin Ping Test - Sound Money Metals 2 videos
The Pocket Pinger
The Pocket Pinger + Stack Stick, Coin Ping Test (Black
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Sound Money Metals Pocket Pinger with Stack Stick - (precious metal tester)
The Pocket Pinger
Got my first counterfeit from 😢 : r/Silverbugs
Limitations of the Sigma pmv original - General Precious Metals
Buy The Pocket Pinger - Coin Ping Tester Online - Pure & Authentic
The Pocket Pinger
THE GENEVA WATCH AUCTION: NINE [Catalogue] by PHILLIPS
The Pocket Pinger