M2 or M4 covering ?

[supertrack]

Hi , I have an original covering for M2 or M4 half track .

I see this marking on the rear .

Can you  help me to know what is it ?

[RB-058]

Hi Supertrack,
It's an old post but did you already had an answer on this question? I'm curious as well to know if this is the part number for M2 or M4 covering so I might be able to use it for my M4 tarp. If it's M4 it should have a bulge in the tarp where the mortar tube could fit in.

Rob