Original Univox Hi-Flier Phase 4 model was introduced in 1977. It was the last in the Hi-Flier series that began in 1968. This model was featured in the popular Nirvana video "Heart Shaped Box". Eastwood has replicated the body, neck profile, bridge and pickups in perfect detail with their Phase 4 model. This was one of the few maple fretboard models from the Hi-Flier family of guitars.