It appears to me that NASA-Tom is using a CZ3D in the following video:
Metal Detecting Real World Techniques Beach and Swimming Hole Hunting
Here is the link: [
www.dankowskidetectors.com]
You should also read the CZ3D intelligence found here:
[
www.dankowskidetectors.com]
Edited 1 time(s). Last edit at 03/26/2014 02:12AM by Bertman.