Abstract: In order to form argyle intarsia patterns, stacked arrays of selection levers cooperate with selection butts, the levers being capable of selecting the needles to be raised. Each array of selection levers is located symmetrically between two adjacent yarn feeding stations for cooperation with one or the other feeding station to select the desired needles depending upon the direction of machine reciprocating motion. The jack lifting and lowering profiles on the respective operative cam rings are symmetrical with respect to the feeding stations and to the arrays of selection levers. The jack lifting profiles include "V" shaped notches in alignment with the selection levers, and, correspondingly, the intermediate-jack lowering profiles include "V" shaped projections provided for further lowering the intermediate jacks.