Dr. Strangelove or: How I Learned to Stop Worrying and Love the Bomb (1964) IMDb
One of those cases where the quality of the special effects actually and consistently does hurt the experience of what is otherwise ingenious.
References here: Fail-Safe (1964), “Bureau of Proto Society” (2015), HyperNormalisation (2016).
Viewed 2018-03-21. Ugly in unsafe old browsers.