Took the GT out for a short spin this morning. Hit an older park downtown. For about 45 minutes it was the same old clad stuff. Then the GT gave that perfect sound and Ron's meter was at 178-179-180. About 2" down I caught a glimmer and then saw how big it was. My mind instantly said , "your 2nd silver .50 piece. Curses!! It was a Mexican silver peso 1966!!.