This is not on classic left/right lines by the way.
This is also the last release with the original "classic" line up.
This particular picture appears to be focusing more along the classic lines of black and white.
The classic line featured 34 vehicles from about 1900 through the 1920s.
"There are a few different periods and styles in here, but they all have classic lines."
Possibly no one wished to have anyone else think they were hearing the classic lines for the first time.
It features the classic line "Stop that man and woman!
Agreed with her when she'd thoughtlessly given him a classic straight man's line?
The whole Classic line was discontinued in the mid of the 1976 model year.
There were two main series, a contemporary line and a classic line.