Limited first run of self released tapes with homemade j-cards, different cover art and white cassette shells with stickered labels.
Halloween had 1000 copies made by a local duplicating company. The band hand packed each tape and made them available for sale to their fans until the official release (which had fallen far behind schedule) were made commercially available by the label.
source:
https://www.metal-archives.com/albums/Halloween/Don%27t_Metal_with_Evil/...