For those interested...900/Manticore VDI chart.

[Dan(NM)]

This was posted on another forum.

Here's what he said.

"These were measured using All Terrain - General with the default settings. Some of the coins were dug and some were not (no corrosion). This may account for some of the differences. The Indian heads, clad and US silver coins were all dug. The 2-cent piece was undug. The clad was all dug as were the wheat cents. The 1919-S was worn and had the "wood grain toning" that is often seen on the San Francisco mint cents from the teens. The gold coin and nickel 3C VDIs were from Tom D's measurements."

 

[vlad]

This was posted on another forum.

Here's what he said.

"These were measured using All Terrain - General with the default settings. Some of the coins were dug and some were not (no corrosion). This may account for some of the differences. The Indian heads, clad and US silver coins were all dug. The 2-cent piece was undug. The clad was all dug as were the wheat cents. The 1919-S was worn and had the "wood grain toning" that is often seen on the San Francisco mint cents from the teens. The gold coin and nickel 3C VDIs were from Tom D's measurements."

What is amazing is how those numbers match up with the i.d.'s of the single sweep analog Teknetics Mk-1's scale reading from 0---100. (and it came out about 1983)

 

[Florida Son]

Thanks for posting, for me that is a dig-it-all scale. Every number has one or more desirable targets.
i tend to listen to tone first then use the VDI as a check. If I ever get the MC i can see using the 2D display as another check, plus rotation, etc.

 

[laplander]

Flying eagle cent 39 40
too high on the 3 cent silver 39 42 is more likely