A series of lettering guides called “Mimeostyle” for the A. B. Dick Company of Chicago (produced for use in making mimeograph machine printing stencils) were custom manufactured by the Wright-Regan Instrument Company (Wrico).
One design featured a sans serif letter produced in Shadow relief, with a touch of Art Deco flair.
This is now available as Template Shadow JNL, in both regular and oblique versions.