Hand-Drawn Barcodes for the HP41

[damaltor]

Hi everybody,

i finally got a barcode wand now. The previous owner sent to me the wand itself, the manual and the paper keyboard, the stickers are obviously missing after the years. Thats fine by me, because it is fairly easy to make your own.

What caught my attention: Together with the paper keyboard he sent me a small sheet of barcodes for the X-Function Module, which are obviously hand-drawn. I am fairly sure that this is an original document becuase you can see faint pencil streaks above and below the codes which seem to be erased after drawing, and under a microscope you can somewhat see the overlapping parts of the "thick" lines which were drawn with the same pen as the thin lines, they are simply 4 lines next to each other with a slight overlap to make it one thick line.

has someone seen something similar before? Was Hand-drawing barcodes a thing back then?