The biggest news of of the 1971 / 1972 Minitrix catalog was that Trix had been purchased by Mangold, but it was more than that. By the time this catalog had reached print, N-Scale had just completed an explosive expansion from simply being very small trains manufactured by Arnold and by Lone Star to becoming a very popular scale. Likewise, the term “N-Scale” was now widely accepted, marking the beginning of a new spurt of growth for both the model railroad hobby and for Minitrix.
The Minitrix 1971 / 1972 catalog was also an exposition of the range of the Minitrix product line. Because of the purchase by Mangold, it must have been felt by the new owners that it was necessary to establish a solid market position. The 1971 / 1972 catalog was proof of that. As mentioned in the accompanying page, the 1971 / 1972 catalog was an expensive one. It also marked the introduction of the track set to N-Scale. The Arnold and Minitrix catalogs for this period both show a range of these extension sets, while the Flesichmann catalog shows simply an N-Scale expansion set along with layouts built using the set along with extra track.