Wow, how cool is that, how did it ring? Were there other targets in the area. I have been doing fields too, and have found some old stuff, just not any old coins like that. I believe I could be in an area where that would be possible.
Congrats for you, I'm happy for you and jealous too, ha lol.
I was lucky enough to put my coil over this coin today. Way out in the middle of the field...