Welcome to our forum. Post any questions and especially photos you wish.
Unfortunately, little has been published about the Hubley aircraft, or their boxes. So there is nothing to refer you to.
Here are some of my boxed Hubley toys


I do know that the plane in the photo, a Navy Fighter Bomber as it was called by Hubley, appears to be the less common version of that toy aircraft unless the tie down is covering a detail, and it has the often missing canopy so you made a good buy in any case.
The first version of the toy had a design fault that required a later tooling change to add a hump on the top of the fuselage just behind the engine cowling to help keep the cowling attached and it looks like yours does not have it- so 1st, uncommon version- or it is it covered over with the tie down??
If you kept photos of the ones you have looked at you will clearly see this hump.
Below is one of the early versions with out the hump, but while the casting is original, the toy has been refinished so pay little attention to the paint schema and finish. {Was No. 495 a P-47 Thunderbolt with folding wings? Why the air intakes on the leading edges of the wing??}

This one below is all original but has the hump and is the second version casting.

I do not have a date range of production for the toy, but I assume it was late 1940s. Sears, FAO Swartz, MW, and other Christmas catalogs have helped date toys such as these so, perhaps someone else on this forum can advise.
As far as touching up the box worn area, I would strongly suggest you do not touch it. Original shelf or in-the-box wear as opposed to child's play wear doesn't detract from a toy's value, but any type of refinishing, renovation does.
BTW Perhaps you remember these other Hubley 'Navy Fighters' from the same period. {A Buffalo with folding wings? Or perhaps just a generic fighter?}

There was also a nicely made P-40 in several versions and a P-38 Lightning in similar finishes
