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There was a group of 75 RS-11s #7219-7293 built for the National of Mexico in 1963-1964 by MLW. This was after regular RS-11 production was finished and superseded by the RS-36. Source X2200 South Issue #45 -- SSW9389 19:58, 4 October 2007 (UTC) reply

The text of the article says "... approximately 426 units built for the US and Mexico over 8 years of production ..." and the data in the sidebar says "total produced 356." Which is correct? — Mmathu ( talk) 20:28, 14 July 2012 (UTC) reply

Neither was correct, the actual total produced is 431 units which includes the five units exported to South Peru Copper. -- SSW9389 ( talk) 13:52, 17 February 2019 (UTC) reply

Dorin, Patrick C. (1972). Chicago and North Western Power. Superior Publishing. p. 144. ISBN  0-87564-715-4. has C&NWRy drawings and spec sheets for their loco’s, that’s where most of this comes from. Sammy D III ( talk) 19:14, 22 August 2013 (UTC) reply