I have something to add. It's not exactly an answer, but it's too long for a comment.
You are linking to 11Logo (which I put on GitHub, courtesy of CSAIL), but this wasn't the first version of Logo. It was first implemented on PDP-1 at BBN, and later updated for a PDP-10.
The PDP-10 version was moved to MIT (the files still have a BBN copyright notice), where it served as a reference for future implementations. Next, around 1971, were Lisp Logo and 11Logo, close in time. In the second half of the 70s came Pascal Logo which inspired TI Logo. And slightly later Apple Logo. There was an abortive attempt at an Atari Logo.
A "floor turtle" (which is what they called the robot) was made at BBN. I don't know if they also had a display turtle. At MIT there was first the big yellow turtle for PDP-10 Logo, and later a smaller transparent half dome version. I have the impression the MIT display turtle came after the floor turtle. There was also a Nova minicomputer involved, which could drive several smaller displays. These are visible in some Logo film footage.
My references for this are from files backed up from the MIT-AI PDP-10, and from email conversations with Logo people.