It was the green one, Columbia. No letters and didn't find any other numbers on the frame. The Murray (Yellow) couldn't find any numbers on the frame anywhere.
I have 2 bikes that I have had for some time and am currently trying to determine what they really are. They both need a lot of work to be road worthy.
The green one only has a sticker on the seat post saying Frame by Columbia and a bike license plate with a date of 1973 on it.
The...