The Halifax Gibbet was an instrument of execution, more modernly called a “guillotine”: a heavy blade, sliding down in its frame to decapitate the condemned. It was hard at work in Halifax as early as the 13th Century [Alister Kershaw, The History of the Guillotine, 1993, p.21]; but needless to say, it was never used in period armory.
Sean Holden bears: Argent, a wooden Halifax Gibbet proper bladed sable.