Whelen liberty model identification help

[danschs2011]

I came across a good deal on a 54" liberty, but it's a model number I've never seen before so I need some help figuring it out. The model number is ST2BBBB I know the B's mean it's a blue bar and the 2 means it's a 54 inch, but what I don't know is the ST part. Is that a WeCan bar or just an older SX bar? The manufacture date is 10/2007

 

[code352]

From a 2011 Whelen catalog

"LFL LIBERTY ST SERIES Super-LED, Serial Communication Lightbars & Accessories, Lightbar includes Four Extended Corner Linear-LED Modules and Clear Outer Lenses with Clear Dividers, with Passenger Side Exiting 15' Cable"

Looks like it is for use with the MPC controllers.

 

[danschs2011]

Thanks for the info, that would explain why it's so cheap.