In the UK, this Mario Bava slasher from 1971 was released cut on VHS (by Redemption) and DVD (by FILM 2000). The Uncut Version was relased on VHS, DVD and Blu-ray as well. The uncut VHS by Fokushin is very rare though. It's also a collectable because it's one of the infamous "video nasties". A detailed comparison between both versions with pictures can be found here.