COSMAC ELF switch panel v2

[Eric Smith]

I wrote:
> I think I'll go with Liberation Sans Bold and/or Liberation Sans Narrow
> Bold. They look close enough, other than having a horizontal base bar
> for the "1", and I think I can live with that.

Here's a PDF showing an ELF switch panel with Liberation Sans Bold:

    http://www.brouhaha.com/~eric/retrocomputing/elf/panel.pdf

The inner circles for the switches are the 250 mil diameter hole, and
the outer circle show the size of a typical internal lock washer that
would be used.