Cat XLS bumper and chassis?

[Northy]

I've found these while having a clear out, both brand new. Is the bumper from an XLS? How do I tell is the chassis is a long one or short one? Does anyone know the dimensions.

They're no use to me, but I have no idea of value. I know the bumper will be rare, the chassis too depending upon what it is.

I hate to do this, but what might they be worth?

Ta,

G