The blades were brazed so that the tubing tapers to the blade's centerline; in which case, the front surface of the blade will bend inwards, and the rear will bend outwards. Neither edge will run parallel with the headtube. This effect is amplified on forks that have crowns that don't have a raised shoreline, such as these.

French builders were quite adept at worsening this effect by brazing their blades so that the rear surface of the blade would run parallel with the headtube, making both the tube's centerline and front taper angle rearwards of the headtube line. Yech. Most of the "bent fork!"-crying fools on this forum couldn't look at most constructeur frames without saying it.

-Kurt