Source: National Machine Tool Builders Association, "Total Industry Estimate Of Metal Cutting Type Machine Tools"
This NBER data series m06093 appears on the NBER website in Chapter 6 at http://www.nber.org/databases/macrohistory/contents/chapter06.html.
NBER Indicator: m06093
Release: NBER Macrohistory Database
National Bureau of Economic Research, Metal Cutting Type Machine Tools, Gross New Orders, Total for United States [M06093USM144NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M06093USM144NNBR/, June 30, 2015.