Ya you’re pretty close. What all happened when White shut Oliver and Moline down is one of the most saddest depressing stories in farm manufacturing history. White was as trash of a company as they come.
White bought Moline in 1963 and they kept building yellow Moline tractors and combines until 1974. The 8600 Moline combine came out in 1974 so this was the last Moline combine ever made in yellow.