B68-454 COMBINATION BEVEL AND SQUARE. Ritchie Patent. Patented in 1884 by Frederick Ritchie of Vanceborough, ME, manufacturer unknown. This is the high end model with the handle made of very dark rosewood and nickel plated brass, 8-1/2" with fixed 6" blade and rotating bevel blade at the other end. Both level vials original and wet. Some light surface corrosion on the blades, one stain in wood and user initials on handle, otherwise near mint. Good+ 500-1000