Rare (if not unique?) 1985 Henna Red/Antracite Buffalo Leather M635csi

1985 BMW M6 Original Description:

Two chic magnets?
Very rare if not unique, ......an original Henna Red-Anthracite Buffalo leather MODEL E24 M635CSi that I have owned since 1991/51903 miles? All operating, stock, including AC.
(At least on BMW M-Registry, listing # 14426 (@ https://bmwmregistry.com/detail.php?id=1442, https://bmwmregistry.com/model_faq.php?id=, https://www.youtube.com/watch?v=kv8O5qmZPi, https://www.youtube.com/watch?v=e-uWiBqhrAY... and hear the difference @ https://www.youtube.com/watch?v=auGn7_ioSO8 and https://www.youtube.com/watch?v=rN3uiB3cRA4 )
"MODEL E24 M635CSi MODEL CODE 5531 VIN VIN NOT VISIBLE PRODUCTION DATE September 1984 COUNTRY OF ORIGINAL SPECIFICATION Germany EXTERIOR COLOR (PAINT CODE) Henna Red (052) INTERIOR COLOR (UPHOLSTERY CODE) Anthracite Buffalo leather (0180)
FACTORY/OEM OPTION S415mm cross-spoke alloy wheels, green-tinted glass, power sunroof, air conditioning, velour floor mats ADDITIONAL EQUIPMENT + COMMENTS
Have owned the car since 1991..."