INSTRUMENTS Note: (a) Including music boxes. (b) Not including mechanical keyboard instruments (Cl. 17-01). 17-99 MISCELLANEOUS CLASS 18 Printing and office machinery 18-01 TYPEWRITERS AND CALCULATING MACHINES Note: Not including computers and other apparatus to be placed in Class 14-02 18-02 PRINTING MACHINES Note: (a) Including typesetting machines, stereotype machines and apparatus, typographi