1852, 10 C. Wilhelm III. black, block of four with grid cancel, the two of them lower stamps touched, otherwise having full to wide margins, weak corner crease lower left, having bright colors and decorative unit, block pieces from of the first stamp Luxembourg are very rare, expertized Raybaudi with photo expertize as well photo expertize Demuth BPP "very fresh large unit with to the right shifted watermark", Michel 6.500.-