These adverts offer some guide to US portable typewriter prices in a very competitive market in the second half of 1964:
The Lettera 32
This model is most common in Australia as the Oliver Courier. It also sold as the Japy (or Beaucourt) and the Swissa Piccola.
"Olivetti type" means a Lettera 32
These are Smith-Coronas, the Scout made in England.This is the Antares-style Underwood, most commonly an Underwood 18 but also a Golden Touch Underwood Diplomat, Avona Jet, an Underwood 10 and Underwood 19. You will need to read the next edition of ETCetera to find out how Olivetti-Underwood got its hands on this Antares design and exactly where these machines were made.