I chose the Tiger coil again to search on my Roman field settings 67 disc 10 sounds Boost first coin was An Antoninianus of Victorinus with a reverse of Virtus. circa 270 A.D. the next was a late coin of Valens with a reverse of Emperor Dragging Captive. Circa A.D.360 the soil is still very soft & deep which is not ideal but the Tiger coil proved it works well.