This is a freelance model, not unlike to #67 and #76 of the NdeM. Thanks to G. Best and his book "Mexican narrow gauge". I really like this kind of model...
If you are dealing with narrow gauge of Mexico or Latin-America (Guatemala, Salvador, Equador, Chile etc.) please let me know. There are not much good informations about railways in these countries, but I would like to learn more about it.
Steffen