printing on HP41 magnetic cards

[Dave Shaffer]

(07-11-2016 06:28 PM)Massimo Gnerucci Wrote:  

(07-11-2016 04:10 PM)SlideRule Wrote:  Here's my fuzzy pics of some cards from the late 1970's using a K&E lettering guide with a 4x0 Technical Pen.

Very nice.
OMG! And you also made a ⌀ !

Those K&E lettering guides were the standard for adding text to the illustrations in scientific papers, certainly back in the 60s and 70s (which is when it was most relevant to me), and I suspect from much longer ago, too. All the Greek letters were available, since math, physics, and astronomy used them all the time.