US & Canadian 7" singles by label: Clocktower
| 1971 |
| Duppy Conqueror - Wailers Duppy Version - Upsetters CT 505 |
| 1973 |
| Everybody Needs A Friend - Roy Shirley Friend Version - Clocktower All Stars CT 502 |
| The Long Way - Junior Byles Version - Upsetters CT 504 |
| 1975 |
| Ital Locks - Johnny Lover Vital Drums - Bradsetter All Stars CT 300 |
| When Knotty Came - Silvertones Knotty Version - Riley's All Stars (Note: Produced by Winston Riley) CT 388 |
| Golden Locks - Upsetters Silver Locks - Upsetters CT 501 |
| Dreader Locks - Junior Byles Militant Rock - Upsetters CT 502 |
| Kung Fu Man - Linval Thompson Fu Man Version - Upsetters (Note: Produced by Phil Pratt) CT 507 |
| Do It Baby - Susan Cadogan Dub It - Upsetters CT 508 |
| Be Thankful - Bunny Clarke Version - Upsetters CT 509 |
| Bushweed Corntrash - Bunny & Ricky Version - Upsetters (Note: A-side miscredited to "Bonnie" and Ricky) CT 510 |
| 1976 |
| When Jah Come - Devon Irons Version - Upsetters UP 512 |