Slasher 75 pics (Nightowl Productions) Slasher 75 is another early run H1 replica made by Nightowl. Most of the masks that Nightowl made before the release of the Nightmare Man 75 were masks that Justin made for himself and not for sale. The Slasher 75 was one of these masks. Very few of these masks were made, making it very rare. * This mask is no longer in production. MASK VALUED AT: $150 - $200