The 68 Assembly Manual under UPC N30/A1 clearly shows this deluxe wheel, including the difference in emblems (insignia) I mentioned above. Also, the Oct. 1, 1967 revised P&A 34 lists your black deluxe steering wheel as:
6.51 Wheel Assembly, steering
68 Camaro w/del. wheel......9747536
The deluxe steering wheel also came in gold, red, turquoise and blue in 68. If your car has RPO Z23 or Z87, it came with that option. If it doesn't, then it was one of the 9178 N30s ordered seperately in 68.