OK, so your car is Black (01) with White Leather Seat Biscuits and Bolsters With Deep Red Leather Welts (1B6M). I don't know what the 7 or N means. I checked Buddy's book and found this.

As described in the patent plate information sheet, the first 2 digits are the color; the next 4 digits are the trim; the next group of digits, either 2, 3, or 4 in number are the month and day of production, and the final digit or two digits are the rotation numbers. The color code system and the trim code system are discus¬sed in other sections of this chapter. The date of manufacture is coded numerically by the month and day, i.e., 116 equals November 6, etc. Occasionally, this will appear, particularly in the later production cars, as "K24", which would equal September 24. The last 2 digits, the rotation number, indicate in which sequence the Mark II's left the plant. Researchers have found that there are gaps in the rotation numbers between certain serial numbers, indicating that the units did not leave the plant necessarily in serial number order. It is believed that a vehicle would occasionally be pulled off the final assembly line while other units continued into the production and then this unit placed back on the line at a later time, to be placed in a ro¬tation number sequence not necessarily consistent with serial number sequence. The letters 'lA, N" etc appears as the last digit in lieu of dates of manufacturing and rotation numbers. We have no knowledge of the significance of these letters.