The first set of menkos are easier to explain than the second. So let's get to it!
Both menko "sets" have a range of drawn images on the front; the second set has a couple colorized images from live action TV show photographs.
Backs have an image of a flying machine along with its name at the top. A janken symbols is in the lower-left corner of the image, with the manufacturer's symbol and menko number at the bottom. Note that menko backs can appear on any card and the same card can have different backs; these backs were used for multiple sets or issues.
This lot is similar to the Kankan cards I posted about recently; Engel's guide for the 1972 Kankan baseball menko set mentions a second type of backs with opposing cartoon characters. Some of the cards do match the printer's symbol in Engel's example picture, so that's a good sign that these were made by Kankan. Others carry the Marusho mark, and one card has a mark I can't identify yet.
We're nearing the end of this menko run!