Who is the builder of the Electric Locos in Paz Del Rio Columbia?

[Dutchrailnut]

I would say based on trucks and car body ends that these units were build by Alstholm (now Alstom) in early 1950's  here is a Dutch Alstholm unit from same era.

https://c1.staticflickr.com/3/2631/4082992670_83c02e5977.jpg

[WP_Malco]

I am interested in the history of these locomotives currently in operation in Columbia.  I see nothing on the web about these units.  They work at the Paz Del Rio Steel company.

http://www.panoramio.com/photo/64484391