This seventy-two-unit apartment block, large even by city standards, is a surprise in Windsor. It was built for the National Acme Company on a site once occupied by nineteenth-century Mill Brook machine shops to ameliorate the housing crisis precipitated by the company's World War I and postwar contracts, which doubled the village population in four years' time. Its designers, the L. A. LaFrance Company, whose work included one hundred and twenty-six apartment and retail blocks in industrial Holyoke, Massachusetts, composed the four-story, flat-roofed building as nine attached apartment blocks. On the street front they used Colonial Revival embellishments that included bow fronts, belt courses, shouldered lintels, and pilaster-framed entrances. The detailing gave each component visual distinction and attempted to make the complex look more like quality housing than a workers' tenement. Tenement character asserts itself, however, on the structure's rear elevation with its four-story-high wooden porches. Inside, vestibules with tile floors and wainscoting led to comfortable, one-and two-bedroom, steam-heated family apartments with cross ventilation, a marked advance over much of the state's earlier workers' housing. Long Vermont's single biggest apartment building, the NAMCO Block was rehabilitated in 1989 to provide low-income housing and has recently undergone further renovation.