The label, distributed by Chess Records, lasted for only two years, releasing 20 singles and three albums. It was the precursor to the pair's Philadelphia International label, which they started in 1971 with Columbia Records. Neptune featured releases by artists such as Jeanette "Baby" Washington, The O'Jays, The Three Degrees and Billy Paul, all who later appeared on Philadelphia International. The biggest hit was the label's first release, "One Night Affair" by the O'Jays (#15, R&B).
- Grimes, William (April 25, 2016). "Billy Paul, Singer of the Hit 'Me and Mrs. Jones,' Dies at 81". The New York Times. Retrieved December 18, 2019.
- Collis, John (1998). The Story of Chess Records. Bloomsury Publishing USA p. 186. ISBN 978-1-5823-4005-0.