GW button number

Does anyone have any idea about what number range a GW button would be on an AT pro ?

That would vary depending on depth , its orientation in the ground and the mineralization in the soil but generally large dandy buttons can read like a bottle cap to almost like an old copper .

I would say if you are field, cellar hole, park or yard hunting it would be a number you would dig no matter what.

The one I found rings an 80 on an AT Pro.