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
People keep asking if the Pocket Pinger will ping small coins like
New Testing Equipment: The Pocket Pinger - General Precious Metals
The Pocket Pinger
The Pocket Pinger + Stack Stick, Coin Ping Test (Black
The Pocket Pinger
New Testing Equipment: The Pocket Pinger - General Precious Metals
I'm developing a ping testing app - General Precious Metals - The
Coin Ping Test - Sound Money Metals
Fake silver and gold! Interview with the Pocket Pinger creator
The Pocket Pinger: companion tool for Precious Coin Tester
The Pocket Pinger + Stack Stick, Coin Ping Test (Black
Cheap Ping Test! - Silver - The Silver Forum
The Ping Test - Silver - The Silver Forum
Buy The Pocket Pinger - Coin Ping Tester Online - Pure & Authentic
The Pocket Pinger + Stack Stick, Coin Ping Test (Black