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The red fields are the NPAs that hosted the Regional Centers for toll-switching established in the General Toll Switching Plan of 1929: [2] New York City (212), Los Angeles (213), Dallas (214), Chicago (312), St. Louis (314), and San Francisco (415) in the multi-NPA states, and in Denver (303) and Atlanta (404) in states with just a single area ...
Electro-Motive Corporation (later Electro-Motive Division, General Motors) produced five 1800 hp B-B experimental passenger train-hauling diesel locomotives in 1935; two company-owned demonstrators, #511 and #512, the Baltimore and Ohio Railroad's #50, and two units for the Atchison, Topeka and Santa Fe Railway, Diesel Locomotive #1.
The modified 512 M had proven to be fast at the end of the season, and Ickx/Giunti also won [7] the Kyalami non-championship Springbok nine-hours race. As the loop hole for the five litre sports cars became obsolete after 1971, Ferrari decided to abandon factory entries of the 512 in favor of developing a new three litre prototype, the 312 PB .
Chicago Great Western Railway: 3 locomotives, #5-7; ... The locomotives ran on AAR type B trucks re-used from EMC boxcab demonstrators #511 and 512. The two NW4s were ...
512 (number), a natural number; Several Ferrari cars: the 512 S and 512 M racing cars, and the 512 BB and 512 BBi, 512 TR and F512 M road cars; 512 Taurinensis, a minor planet orbiting the Sun; The area code 512 (Austin, Texas area) 512th note, a musical note played for 1⁄512 of the duration of a whole note; Site 512, US military radar site ...
By the 1930s, Chicago had the world's largest public transportation system, ... 507–510, 512–522 1950–53 CNW Routes 508, 516, and 518 sold to IPH.
To stave off exhaustion by the end of 2013, [1] area code 737 was introduced as an overlay of 512 in July 2013. Ten-digit dialing within the 512 territory was phased in beginning December 2012 and made mandatory since June 2013. [2]
Kellogg company logo as used from the 1920s to the 1950s. The Kellogg Switchboard and Supply Company was an American manufacturer of telecommunication equipment. Anticipating the expiration of the earliest, fundamental Bell System patents, Milo G. Kellogg, an electrical engineer, founded the company in 1897 in Chicago to produce telephone exchange equipment and telephone apparatus.