Thatβs a sick copper! Iβve been blessed to have dug two varieties. Yours looks like a Crosby 1-A.
Hereβs a chart.
Congrats on a really nice one since most dug ones are roached. They say the earlier Novas had better quality planchets - which may explain why 1783βs survive the best. Either way, killer find!
1970 COMPASS-
WHITES SILVER EAGLE-
WHITES DFX, 4X6DD COIL, 6X8DD COIL, 950 COIL, 10X12SEF COIL-
GARRETT PRO POINTER AT, GARRETT AT PRO , MINELAB EXPLORER SE with 8.5x12.5 Cors coil