Northline Music Records was a custom recording label. It managed at least one single. an EP by Folk trio Kinfolk, 'Early Morning Rain', which was released in 1977. The catalogue number, NL-510, may be an indication that there are other Northline Music records. A scratched-out number on the run-off suggests that the catalogue number was initially intended to be KIN-001. Pressing was by Orlake. There was an album by Hamilton Sound And Friends, 'Astral' (NM-152 S). Presumably there are others. Distributed By Northline Music Records. Thanks to Robert Lyons For The Info.