This original 1961-1962 Chevy 2-Door Hardtop LEFT/DRIVER'S SIDE Quarter Window Front Channel is for a Bubble Top ONLY. Some channels may have the adjustment screws still attached. In the early production of the 1961 Bubble Top, GM produced only the front channel guide which is slightly shorter than the later production (see photos). But this produced problems when raising the quarter window and so later in 1961 they produced a second rear channel to alleviate the problem.
Fits only 1961 Impala Hardtop; 1962 Bel Air Hardtop