Body number sequence.

[69L72RS]

Hello: I just joined this site and am posting my first question.
I have a 69 COPO RS car that I have not been successful in tracking down its paperwork. It has most of the original parts, but no paperwork. Several previous owners back up its past, but none have any papers on it. I did find a bit of info that I hope will be helpful. A brown COPO RS car just sold on ebay. Its body number is 111141 and the body number on my car is 111140. Weren't these consecutive cars on the assembly line? My car has almost identical options, except for the color ( mine is Lemans blue w/ black top). Can these numbers be considered as partial proof of the authenticity of my car?
Thanks for any help.
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