The crossguards:
To me, they look more like early production EP&S guards than the ones on my SA Christmas dagger. As with the tang, seeing the insides of the guards will be a key to the full identity of the dagger. There are minimal traces of verdigris on the undersides of the upper crossguards.I've seen this before on SS daggers.
The grip:
The wood does not bother me. Many SS grips were made of lighter wood that was dyed and has later faded. A look at the grip out of the guards might tell more.