Oxygen loss at the surface of Bi 2 Sr 2 CaCu 2 O 8+x single crystals provides CuO 2 layers with different critical temperatures. Particularly for overdoped crystals this allows to achieve a T c maximum near the surface. We performed transport measurements of this oxygen depleted layer. Samples were prepared by evaporating four Pb or Ag electrodes on top of freshly cleaved Bi 2 Sr 2 CaCu 2 O 8+x single crystals. Using overdoped crystals with a bulk T c of 55 to 60 K, the outermost layer was found to be underdoped with T c down to 30 K while the adjacent one was near optimal doping with T c between 80 and 90 K. The T c of the third layer was close to the bulk value. For temperatures above the bulk T c often only one CuO 2 double layer was found to be superconducting. We discuss current transport measurements with current flow along the CuO 2 layers.