73 - READING IN M.P.H.;ONLY USED WITH AUTOMATICTRANSMISSION AND AUTOMATIC LOCKING DIFFER-ENTIAL,OR ACCELERATION SKID CONTROL Model designation: 124 - 061
75 - READING IN M.P.H.;ONLY USED W/AUTOM. FIVE-SPEED TRANSMISSION & AUTOM.LOCKING DIFFER-ENTIAL,OR ACCELERATION SKID CONTROL Model designation: 124 - 061