Graham Silverstone RS Skeleton. This limited edition watch was inspired by car mechanics and aero-dynamics of sports cars. The Silverstone RS Skeleton collection by Graham, limited to 250 pieces per model, brings together an imaginative fusion of quality materials, urban design and splendid craftsmanship. 46 mm stainless steel case lined with black ceramic bezel, which is set with gray tachymeter scale. The Grey skeleton dial shows hours, minutes, seconds and chronograph scale indicated with green hands. The strap is made of color-matching black rubber.