Here are images of a book published around 1970 from Auto World entitled HO Racing Speed Secrets. These images were provided by Phillip Laurio. Thanks Phillip!!

Note I have tried to enhance the images for readability. Please click on the image for a larger image. or press and hold the "CTRL" key while pressing the "+" key to enlarge the screen. To bring the screen back to the original viewing size press and hold the "CTRL" key and press the "0" (zero) key.

Here's an article I found on rewinding pancake armatures. The images have been enhanced to help readability. Please click on the image for a larger image. or press and hold the "CTRL" key while pressing the "+" key to enlarge the screen. To bring the screen back to the original viewing size press and hold the "CTRL" key and press the "0" (zero) key.