OT Friday Quiz: Which Doesn't Belong, and Why?

Three of the following four cars pictured below have something in common.  One of the four cars does NOT share this particular commonality.

WHICH ONE DOESN'T BELONG, AND WHY?

BMW E30 Top Cabriolet

 BMW 1502 Convertible

Porsche 959

BMW E21 Top Cabriolet

Good luck!    ;)

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;

;;

;

Answer:  All of the cars pictured are Baur products with one exception:

The BMW 1502 is a Lumma convertible conversion, NOT a Baur. 

 The E30 Top Cabriolet 4 door is a one-off Baur; the E21 Top cabriolet is a Baur, of course, and the Porsche 959 was also produced by Baur, under Porsche supervision.

Thanks for playing along!