Is 2-oxobicyclo[2.2.1]heptan-1-ide resonance stabilized?
I think, in contrast to cyclohexanone, a resonance stabilization by 



is less likely to happen as you already start with a bi-cyclic compound where the cycles involved are small to moderate. The then additional strain introduced by a (partial) double bond at the bridge-head carbon atom would destabilize the molecule too much.  I extrapolate here from Bredt's rule.