Regarded as one of the greatest air-cooled Porsches—and among the finest all-around sports cars—ever constructed, the 1973 911 Carrera RS 2.7 rightly sits at the center of many world-class collections.

Yet the Carrera RS 2.7 presented here offers even more to the discerning enthusiast: It is one of only 200 examples of the hallowed model built in the factory Lightweight specification.

Further enhancing its desirability, is an extremely rare United States-delivery car with a known history from new.

Equipped with its numbers-matching Type 911/83 magnesium-crankcase engine and numbers-matching five-speed gearbox, and also exhibiting the correct under-dash Porsche production number, it is finished in its factory-correct colors.

As noted by the copy of its original Porsche Fahrzeug-Auftrag (vehicle order form) on file dated 29 May 1973, this chassis was specified in Grand Prix White (908) with red exterior lettering over a Black leatherette interior.

Factory options include a tinted/he...