Yes, you did. WARNING! These things fall apart very easily. I'd coat it with either a spray of flat polyurethane after it's totally dry or several coats of Elmer's glue thinned with water. It WILL fall apart to some extent if you don't. VERY nice 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
I'd use clear lacquer and paint it on. Thick on the sides and back... the front I'd dab to make a thin coat. Dab not wipe... wiping could catch and create edge loss.