1961-1962 Chevy 2-Door Hardtop Bubble Top OEM LEFT Quarter Window Rear ChannelThis 1961 1962 Chevy 2 Door Hardtop Bubble Top OEM LEFT Quarter Window Rear Channel is an original GM part that has been restored. 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 product photos for Front Window Channel). But this produced problems when raising the quarter window and so later in