Specimen of Capitals

This image is the alphabet written out in thick, black script. The main lettering is in a square block, with the first row containing A -G, the second H-M, the third N-T, and the final row containing the letters U-Z. Along the right side are smaller letters. From top to bottom they read C, U, JJ, WBB, S and L. There are what appear to be dark brown stains over the letters B and C, and E and F.