This video, he fails to show what the code was for a blank entry. Maybe 9 was the default they were using, and that’s why the 68 manual was set that way.
We need other BC examples from 61.
We don’t know what other documents say.
I still think Zullo is correct.
“This video, he fails to show what the code was for a blank entry.”
Two different 1961 manuals were shown, there was no code for a blank entry.
“I still think Zullo is correct.”
It was clearly shown that the chart he claimed was from a 1961 manual, was taken from a manual that didn’t exist until 1968.