Great Northern Railway Company
For reference, this book refers to the Y-1 and Y-1a classes of electrics as "General Electrics" or "GE's". These units were numbered 5010 through 5017 with 5011 being the sole occupant of Y-1a class.
The Z-1 class of electrics are referred to as "Westinghouses". These units were numbered 5000 to 5008 with several renumberings.
CLICK HERE for the Table of Contents of the above Y and Z class electric locomotives.
The W-1 class of electrics built by General Electric (#5018 and #5019) have their own section in this book.
CLICK HERE for the Table of Contents of the above W class electric locomotives.