etrac fe/co numbers

[barter]

like a old penny would be 12-42ish,or a old sixpence would be 12-48ish
what average numbers would i be looking for,for roman coins

[Chef Geoff]

First of all, some advice from one who knows.........forget the numbers and learn the sounds, the numbers lie the sounds don't or should I say, they are right more often than the numbers.
Secondly there is no such thing as a "average" Roman coin, they come in all sizes and different metal mixes and you should be digging anything from 17- to 1- and any conductivity. But most coins, regardless of age generally come in between ferrous 8 and 14. A Roman radiate can come in at 12-8 and a Sesturtius at 12-48

[dances with badgers]

numbers on accurate to a depth of 6 inches ,like goeff said listen to the tones