Vintage THINGS OF SCIENCE KIT - Computation Unit No 209 March 1958 Used

Description

Vintage THINGS OF SCIENCE KIT - Computation Unit No 209, published in March 1958, 64 years ago.
Includes the instructions, an order form for "membership", the slide rule, and a piece of paper that has been cut into three strips. I do not know if more came in this kit!
Instructions-have been folded for many years, missing bottom staple.
Order form-has also been folded, very worn at the top, and discolored.
Slide rule-great condition, still slides!
Piece of paper cut in thirds-well, it's been cut in pieces, and pieces have been folded for many years.
See photos.