Can someone check this for me

[DirtAngler]

I recently came back to a Safari by trading in a V3I. I was doing some coin testing and this has me stumped. A silver dime and silver quarter come in where I expected, reading about 38. So then I test my 1921 Morgan silver dollar and it reads 32. On every other machine I tried doing this test, the silver dollar always read higher than the silver dime and silver quarter.

 

[jimdoc]

Do you have another silver dollar to try?
Maybe that one is an Ebay made in China special.

 

[kschae4]

I quick air tested an 1879 Morgan Silver dollar in low density (more accurate then high density) and in all four hunting modes it rang in at 33-37,but had a higher tweet than copper. To prove I wasn't dreaming, I then tested a 1919 SLQ which rang true at 38-39 tid... will follow up with some half dollars next time. Hope my Morgan isn't counterfeit.......

 

[DirtAngler]

No, the Morgan is one my Dad has had for years. I know he's had it at least since the 1950's.
No that is the only silver dollar I have.
Maybe it's something with Morgan's since kschae4 got the same type of results except as I stated before, all other detectors that I tried this with, the Morgan dollar read higher than the silver quarters and dimes.

 

[kschae4]

Okay, air tested a few other coins in low density:
1941 Walker-37
1943 war nickel-14
1949 nickel -14
1971,76 half dollars -35-36