Identifying Vintage LEGO Instructions
These are instructions from "LEGO Books - Idea Book #1 or 221", that was released in 1973.

YouTuber BrickTsar uploaded his entire childhood book HERE.







Similar to the LEGO Idea books I had as a kid in the late 80's, these types of books were made with multiple sets in mind. 

So, there isn't a focus on one specific set. The focus was you nagging your parents on what was vital for your next birthday.