Thanks for your comments.
I showed the axe head to a fellow doing a hewing demonstration at the TTRAG event this past weekend.
He suggested the head should be sharpened back to remove the chip as it will create a tear at this chip point when it is used to hew a timber.
Some by standers suggested that this tear could be used as a signature mark on the timbers to show who hewed it, when the frame was inspected years in the future.
Jim Rogers