Hi Rob and Laurenz
The 1.5mm typeface works out to 17 cpi. A Type-Pal member in the USA has an Olympia SG-1 with 1.5mm (17 cpi) and I received a letter typed on that machine. A good pair of reading glasses is a must for me to be able to read that type. However, wouldn't that have been a great machine for typing on those Aerogram letters? You would be able to get a lot of information on the 3-fold correspondence. All the best,
Sky
We humans go through many computers in our lives, but in their lives, typewriters go through many of us.
In that way, they’re like violins, like ancestral swords. So I use mine with honor and treat them with respect.
I try to leave them in better condition than I met them. I am not their first user, nor will I be their last.
Frederic S. Durbin. (Typewriter mania and the modern writer)