With its reversed offset body, the Hi-Flier has an intentional resemblance to the Mosrite Ventures model.

The top of the Hi-Flier headstock has two U-shaped cuts, echoing the three-notch "M" shape of the Mosrite.

The first Hi-Fliers have a three-tone sunburst finish, pearloid white pickguard and truss rod cover.

(Rarely, white finish and green burst finish also, can be found in U.S.) These are very similar to the earliest Hi Fliers, except that they have a red tortoiseshell pickguard and truss rod cover, often slimmer neck/body (which became standard for all Hi-Fliers around this time period), and a badge that reads "Univox Custom."

In 1971, a redesign retained the single-coil pickups but included the following changes: In 1974, the Hi-Flier was updated with a new finish option (Natural).

Though these humbuckers strayed significantly from the Mosrite design, their unique tone and high output have made this a sought-after version of the Hi Flier.

Most prominently, Phase Four Hi-Fliers saw a hardtail Gibson-style stop-bar bridge/tailpiece replace the former Fender Jazzmaster-style separate vibrato and roller bridge setup.