The Noble Collection Products
http://www.noblecollection.com/catalog/product.cfm?catid=13&id=NS9131
"Based on the design found in his notebooks, The Flying Machine is recreated for the collector in polished brass, acid etched with the most famous DaVinci notebook drawing."
The Noble Collection Products
http://www.noblecollection.com/catalog/product.cfm?catid=13&id=NN0627
"The pocket watch features da Vinci's famous Vitruvian man illustration in bas relief on the cover. Inside, the mechanical watchworks are visible - a touch that will delight the da Vinci in anyone."
The Noble Collection Products
http://www.noblecollection.com/catalog/product.cfm?catid=13&id=NN2114
"A mariner's style compass scientific instrument. Movable rings are encircled by two interwined dragons."