This machine used tractor-feed roll vinyl 15' wide. The machine didn't have a computer screen, just a little LCD bar not much different than the readout on a standard vinyl plotter. You had to load different cartridges to change typefaces. If I recall correctly Helvetica Medium was the default font. For those not familiar with the Signmaker IV B, the original unit had these pretty expensive font cartridges.
Back in the early 1990s our shop had a Gerber Signmaker IV B.
