Who did not have one of these? This one is the 1967 blue tray Spirograph Nr# 401. This one is complete except that the small number 24 wheel is missing. and the pens need new refills. All the instructions are there. Developed by British engineer Denys Fisher in 1965. In 1966 Kenner got the rights for the US market and it began selling them that year. It seems they come out with a new addition every few years so there are plenty of chances to get one. I like this old one because of the art work on the cover and that it is almost complete after so many years. 1967 was a good year. Add one to your collection.