S01 e17 Underwood Universal Typewriter

S03 e24 – Lucy Writes a Novel – Remington SJ Typewriter

S04 e23 – Bull Fight Dance –  Hermes Baby Typewriter

See vintage Hermes Baby Typerwriters on eBay

Look for the Remington SJ on eBay
See the Underwood Universal Typewriter on eBay: https://www.ebay.com/sch/i.html?_nkw=Underwood+Universal+Typewriter&_sacat=165654

Many Thanks to Jamie for the ID and screen captures