The tang is not rusty and there is resin residue inside the handle.
Well, the flash does prove a bit of red rust to be present...
The tang looks robust and it is possible that stable and active rust are relatively thin.
How wide is the gap? 3-4 mm? There may be a single "crown" missing here (usually made of suasa)!
The fitting between scabbard and blade is good but not perfect.
Sounds good - given some erosion of the blade and shrinking of the wood a perfect fit is not to be expected.
Congrats, looks like a nice, genuine ensemble!