Board etched in copper on the top A000951 ANTI-AIRCRAFT 2 PAT NO. 3793483 MADE IN U.S.A. ATARI (c) 74 Board etched in copper on the bottom 002992 PAT NO 3793483 ATARI (c) 74 ANTI-AIRCRAFT 2 .k1 n82s23B ROM dump showed airplane and flying saucer? WinROMIdent 1.05 ============================ aa.k1:[9DE772D5] Not Found! ** warning some unused bits [01111111] possible bad ROM.