Listened to about 20 1948-1950 radio shows so far at the Internet Archive. Here is what I have learned so far.
Los Angeles is hot, sometimes humid, sometimes warm
Cars needed to lubed monthly
Lots of middle class people, even married couples, lived in cheap hotels and boarding rooms
People smoked everywhere
Los Angeles High schools had lunch counters and soda bars
No Miranda warnings
“Mind if we look around” request always OK’d by even the guiltiest suspect
No one lawyered up … ever
People made a decent living giving shoe shines
“Store Charge plates” preceded credit cards and were made of metal
Checking partial license plate numbers took dozens of policemen weeks of man work
IBM computer reading punch cards was the height of technology
Full lunches with dessert and soda were incredibly cheap at .65 to 1.00
Mink coats were oddly expensive at $ 5000
Cigarettes were a BFD
Police were always scrounging for change to make paid telephone calls out in the field
Smoking almost considered a positive habit people were proud of
“Signed statements” were a big deal for cigarette product testimonials
Marijuana would make you go crazy and drive fast and kill yourself
There were no black people in Los Angeles
Did I mention about cigarettes?