In another thread (Corvair engine air duct) the discussion went about the ways AMT attempted to cut costs near its end in Michigan.
The American LaFrance fire trucks kits were a good example of the attempt to cut cost by eliminating the clear yellow and red trees and dechroming the kits.
They placed those parts on the chrome tree.
They even shot the ladder in the Ladder Chief in white plastic,
Chrome parts from original release and white plastic from mid 70's /80's releases.
greg