One is the Original Picture
Please note that this WAP-4 has roof mounted Dynamic Brake Resistors.
For details about roof mounted Dynamic Brake Resistors please refer :
/faq/post/1129 ================================================== ================================================== =====
The WBL Series of Pantographs are known as "Schunk".
For more details about "Schunk" please refer:
click here(The PDF Document is attached with this BLOG For Reference)