This was presented to me as a Lotus Wobbly Web wheel which it obviously is not... It does look to be magnesium, and maybe even old (unfortunately apparently freshly painted). I'm told it's 14.5 x 7 inches with a 3 and 7/8 inch PCD http://www.simplesevens.org/details/MagnesiumWheel.jpg So what is it? Cheers,John D.