https://archive.org/details/RemingonLargeType

Episode 1296 - The Mister Rogers' Neighborhood Archive<br /> by [[Mister Rogers' Neighborhood]]<br /> Airdate: April 9, 1973<br /> accessed on 2026-02-02T14:06:32

Mister Rogers and Mr. McFeely demonstrate how a large typeface typewriter (6 or perhaps 4 CPI) works for typing out speeches.

Archived version of the episode at https://misterrogers.org/episodes/mister-rogers-shows-how-a-teleprompter-typewriter-types-large-letters/

https://typecast.munk.org/2011/04/23/1964-nomda-blue-book-olympia-font-styles/

The following were the available Olympia type sizes as listed in the 1964 NOMDA Blue Book:

• 10 pitch (2.6 m/m) pica
• 11 pitch (2.3 m/m) elite
• 12 pitch (2.1 m/m) elite
• 17 pitch (1.5 m/m, calculated)

Not in the NOMDA Blue Book, but found in the wild on a 1971 Olympia SG-3: - 6 pitch (4.2 m/m) with typeface: Basic Writing No. 67

6 pitch would be 4.2 m/m