Framework Molecular Orbital Models, Prentice-Hall, Inc., Englewood Cliffs, New Jersey, complete kit with instruction manuals, in a wooden case. Estimate $100-150 Items may have wear and tear, imperfections, or the effects of aging. Any condition statement given, as a courtesy to a client, is only an opinion and should not be treated as a statement of fact. Skinner shall have no responsibility for any error or omission.