These pickups were already in production for the Ripper (Strat copy) and Gimme (Les Paul style). Univox Hi Flier Phase 3 guitar Phase Three Around 1974, the Hi-Flier was updated with a new finish option (Natural), and twin humbuckers replacing the single coil P-90 type pickups. This would remain throughout the rest of production.
It is impossible to date these guitars by the serial number as it is uncertain whether records were kept on their production.