Where is the serial number?
The serial number is printed at the bottom of your machine. if the Machine Type model information is needed, it is just next to the serial number.
  • Serial Number – 7812AB3
  • Machine Type – 2668
  • Machine Type Model – 2668KHU
Where is the correlation number?

EXAMPLES

Thinkpad Advanced Mini Dock Series 3 & Plus Series 3 (bottom view).

ThinkPad X4 / X6 UltraBase Dock (bottom view).

ThinkPad Dock I, Dock II, or Mini Dock (bottom view).

Thinkpad Advanced Dock (bottom view).

Thinkpad Advanced Mini Dock (bottom view).

X200 Ultrabase (bottom view).

Where is my docking station type?
Your docking station type will be located on the bottom of your device. Please also refer to the images below as a reference.
Type 2887
Type 4336 Type 4337 Type 4338
Part No. 92P3429 Part No. 41U3120 Part No. 40Y8116
Type 2503 Type 2504
Type 40A1 Type 40A2