This SVG stroke font can be used with the Hershey Text extension included in Inkscape 1.1.1 to recreate the octagonal geometric lettering used in Elektuur in 1983-1985. It contains lower-case letters only but adds an updated e (somewhat like the one used since the end of 2012).

To install oktuur.svg, copy the file into the svg_fonts folder as configured in menu Edit→Preferences…→System in the Inkscape extensions field (usually something like Inkscape/share/inkscape/extensions/svg_fonts).

To use it, go to menu Extensions→Text→Hershey Text…
and configure:
  →Render
    Font face: Other (given below)
    Name/Path: oktuur.svg
    (→Apply)
And optionally go to:
  →Utilities
    Action: Generate glyph table in selected font
    →Apply

(Apache's Batik provides better SVG font support and displays all 3 included fonts.)