The document shown in this page is the Instruction Manual to the Bolex 18-5, an 8mm projector which was made in the early 1960s and was a very popular model because of its reliability and good engineering.
To quote the manual:
As the owner of a new BOLEX 18-5, you have at your command the world's most versatile 8mm movie projector. With its exclusive 'living still' advantage, plus a wealth of other new features, the 18-5 can be your source of many years of superb viewing.