Which fonts were used in old (1930s) aircraft cockpit displays and instruments? This is probably more of a graphic design question than aviation but maybe a few hangar rats around here know the answer.

What type fonts were used on the old instruments in aircraft from the 1930s like Lockheed Vegas, Electras, Beech Staggerwings, DC-3s, etc.?  I need it for a web site I’m working on.
I've seen a few times that even hand-written markings were used. This suggests that there hardly was any consistency.


  Photo from Darwin Aviation Museum: