Last week I received sample slugs from
MicroMetals. The engineers over there were a great help! The slugs match the sizes as defined in parts list, so they'll be a good starting point.
@Benta, @AlexEisenhut, the image is a scan from a B&W manual from, yes, the early 70's! I'm sure the Handbook photos were just like the one above.
Regarding the solder joints...not my build. If I could find my actual device, I would be
curious scared to see the soldering job of me as a 10-year old.

So what's the big reveal?
Back in the 70's, Estes made a Model Rocket Transmitter kit called the TRANSROC. It was a 27MHz transmitter that pulsed the carrier (in rocket-finding mode), and among other things, could transmit audio. It was a neat little device for its time. I have the manual, but the actual transmitter must have been misplaced over the past 40 years or so.

I'm going to build one.
Why? Because I can (with some help from the forum I'd expect -- RF isn't my strong point). I'm going to make it as close to the original device as possible. So far, in addition to the slugs, I've obtained most of the old semiconductors. In the next week or so I'll start a new thread documenting the journey.
To sort of stay on topic here, does anyone have suggestions on what to wind the coils on? The slug threads are standard screw sizes, so I was thinking of taking the correct size screws, wrapping and gluing several layers of thin (parchment?) paper to the desired diameter, and then cutting to length.
Any other thoughts?
Thanks,
-Frank