Simula 67 long predates OOP. Which, when you think about it, means that when OOP was coined it referred to a "message passing" paradigm, not "classes" or "objects". "Oriented", not "object", was the operative word. Having objects does not make a language object-oriented, at least not as it was originally conceived.

Simula 67, like Java, may fit into some newer OOP definitions that have come about over the years, but it was not considered OOP at the time of its arrival. The term OOP hadn't even been invented yet. And when OOP finally did get used for the first time, it most definitely did not refer to Simula 67. Where on earth did you get the idea that it did? Whatever gave you that idea was, frankly, nonsense.