Kirby Razor's distinguishing feature, was a scalloped head.
It arguably eenhanced lubrication, thus less irritation.
Thus worthy of consideration.
The height of the head is too high from dimensional appearances, it will restrict the ability to shave against the grain under the nose (which also is why some razors left the blade tabs exposed btw).
Handle, lets try thicker and longer, so it is easier to hold, has more heft to it and allows for more variation for users preferred balance.
The grip will be diminished with the current design, perhaps it could be engineered to incorporate an interchangeable sleeve for preferred handle grip design.
The numbers upon the dial also are not visible enough in the current design, a contrasting design may be the best option.
Materials, offer them in a range of base metals, such as brass, bronze, copper, titanium, aluminium and rhodium for those that are willing to pay the required premium, or seek a cheaper option.
Whatever you do, please do not utilize zalmak as is the case for Merkur.
The metal alloy is prone to corrosion, thus substantially weakening the metal to the point that the razor snaps.
