New Genuine Lenovo ThinkPad USB 3.0 Pro Dock 40A70045AU - Notebookparts.com
Lenovo W520 shown booting with 3 external monitors, using ThinkPad USB 3.0 Dock 0A33970 for the 3rd - YouTube
Refurbished Grade A Lenovo ThinkPad W520 15.6" Laptop, Intel Quad Core I7-2720QM up to 3.3Ghz, 4G DDR3, 320G, DVD, USB 3.0, VGA, DP, DVI, W10P64-Multi Languages Support (EN/ES/FR), 1 year warranty -
Lenovo ThinkPad W520 Overview – Laptoping
Lenovo Thinkpad Mini Dock Series 3 Type 4337 x1 USB 3.0 for W520 (NO AC ADAPTER) | eBay
Lenovo Thinkpad Mini Dock Series 3 Type 4337 x1 USB 3.0 for W520 | eBay
0A33970 - Lenovo USB 3.0 Docking Station for ThinkPad X1 X220 T420S W520
Usb 3.0 Port Board Cable For Lenovo Thinkpad T520 T520i W520 15.6" I/o Sub Card Rj-45 Socket Pcb 04w1563 - Pc Hardware Cables & Adapters - AliExpress