In lieu of an NCRS report of the shipment date, a good estimate is as follows:
Based on your VIN (124377N150838) and the 1967-1969 LOS/NOR End-of-Month Monthly VIN Report in CRG archives, we can 'estimate' the actual date based on fairly equivalent daily production over the 21 work days in December 1966. The first Camaro produced in Dec at Norwood was 140231 and the last one was 160043; There were 19813 Camaros built that month of which yours was the 10,608th produced. Norwood was building an average of 943 per day. Based on that average, your car was likely built the 12th work day (on December 16th, a Friday).