Christina: Thanks for reading and commenting.
So that would put this about the late 1960s at the latest. Quite honestly I'm having a mental image of the 50s.
According to Wikipedia, 9-1-1 went Nationwide in 1968. Lex said that his folks died prior to that, so it *could* have been the 50s. If Lex was the same age as Perry (hypothetically), he would have been born in 1944. It's rumored that his parents died when he was a pre-teen, so let's add 10-12 years, so that would be 1954-1956. Good guess.
CLARK:

Er... Lois... Perhaps you misunderstood me...
Thanks for the comments.