It means it is NOT the exact chassis but almost so.
You can almost always use it for the repair but watch for differences.
These look like Zeniths & it was about the time they switched to System 3
styled chassii from the old CC2 chassis. The lowest numbers are
usually left overs. So you need a chassis number or photo of
chassis to ID it.
BTW dont buy from Sams, too much $$. Try hear 1st.
73 Zeno
LFOD !