Sc. 703 - 11/9/62 - s3 buff & black
Co-Co Class 1010 electric locomotive
& 2-2-0 locomotive "Austria" with four-wheeled passenger coach

So what does "Co-Co" mean?
We learned back on this page that it has something to do with wheel arrangement.
I found this page that explains things, though somewhat cryptically:

The "C" means three powered axles, the "o" means the axles are independently powered, and having "Co" twice means there are two bogies or trucks.

Here is another page that discusses wheel arrangement designations, in more detail.

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