Paul1986 wrote:

Hello everyone
Is it possible to "transplant" the carriage of a selectric 1 onto a selectric 3?

It is possible but probably not practical.  Many improvements were made through the iterations of the Selectric.  Using the much older carrier will likely require you to replace the return cable as the end connections will be different in order to work with the carrier.  I know of people who have replaced the Selectric III 210 bicycle ribbon carrier with the Selectric II Selective Ribbon System carrier.

Paul1986 wrote:

Hey typewriterguru, thanks for responding.
Keeping my fingers crossed, I have just sent one to have to procedure done. Let's see how it plays out.

Hi Paul, what happened with your experiment. I had ever wondered: would it be possible to do it?
A Selectric 1 allows us to use cloth cartridges, and the selectric 2 allows us to change from pica to elite.
Combined the two you would have a machine that allows you to use cloth tape, change the font and size.
Could you make it?
Greetings from Argentina!