Front facing with lapel attached to upper collar only to lapel notch. This once upper collar has been checked for turn of cloth and proper finished width. This before front facing is attached to jacket front that has been pad stitched. Men's tailoring, facing will be attached to front with pad stitching before front facing is attached to upper collar.
Finally we turn the collar narrow edges to the undercollar and hand stitch these edges to the felt undercollar (photo 40). This is the way to do this, lovely and easiest method to join upper and lower collar ever. Check upper collar for turn of cloth before trimming and joining to neck facing or lining.