Brian, et al.,
With the attached information I am satisfied with
Minas Tecolotes y Anexas as to my the question about reporting marks
M.T. y A.
Apparently both Veta Grande and Tecolotes properties were apparently owned by ASARCO, and both were in Chihuahua, Mexico.
I'd like to sincerely thank all who responded to my request.
Kevin,
I tend to agree with you that Morenci didn't have any Ingoldsby ore cars, and that they would make for an interesting 3D printed project.
Again, "Thank You", and "Happy Railroading" to all...
Al Clemens