N
ew version: Plastic body and with illuminated bezel:
http://i.ebayimg.com/t/Nikon-EL-Nikkor-2-8-50-N-M39-/00/s/NTAwWDUwMA==/z/fOEAAOSwxH1UDEGo/$_35.JPG
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Old version: Metal body and without light shield:
http://thumbs.ebaystatic.com/images/m/mE34OES8w84nFglRdTvfD8w/s-l225.jpg
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I used to have the old version. It was slightly better than the 50mm Rodagon (latest version) and slightly worse than the 50mm APO-Rodagon N.