John - the part number is 914 347 087 10.
Although I have had probably over 40 380mm 914/4 & 914/6 steering wheels, I have not personally had one with this part number.
The 3 key features which identify whether a particular 380mm steering wheel is
of the type* fitted by the Factory to a 2.7 RS are:
1) Flat (ie non-recessed) centre to the hub where the part number & date code are stamped
2) Flat (no recess) edge to the protruding splined portion on the rear of the hub
3) A raised 'lip' around the edge of the wider part of the hub on the rear
For a clearer explanation with photos see my posting from a couple of years ago on the Early 911S Registry:
http://www.early911sregistry.org/forum/ ... =914+wheel
* The
only way that you can state that a particular wheel is from an RS is if you know that it came from a particular car & that it was the original steering wheel as fitted by the Factory...