VIN
An original E9 had three identical numbers on the shell firewall, the VIN plate and the engine. If you add the BMW certificate, the 4 identifications help with proper documentation of a given E9.
Original VIN plate
Original vin
on the shell
The original CSL VIN plates said "3.0 CS".
Look at the stamping font. This is hard to reproduce.
And the last document is the BMW certificate
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