Sounds like a probable printing error on the box.
I would go with what's etched in steel.
(As this will be a point of reference in the long term,
The box in all respect, would have disintegrated in time)
And decidedly live happier
Knowing that it's the better of both steels.
I understand the predicament
But Sometimes dwelling too much on microscopic details
Can be rather frustrating and down right disturbing
For little or no reason.
Enjoy the product for what it was designed to do
It really shouldn't turn out to be a tool for mental torture.
Just my 2 cents.
440A is a decent steel, in my experience, provided it has a decent heat treat.
440C was/is one of the first "Super Steels".
I remember back in the 1960's and 1970's "everyone" wanted 440C. Naturally, the market provided. Unfortunately, not all had a good heat treat. Some were excellent (Buck, (excluding the Schrade and Camillus contract made 300 series, which were not 440C) for instance) others were garbage; they would not take or hold an edge. (The cheap no name $2 and $3 "Gas Station Specials" for example.) I remember it was hard to find a knife that was
not "440C" for a while, in the area I was raised during the late 1960's and the 1970's.
I do like these two knives. I regularly carry the Stockman.
I also bought a Böker "Magnum" 4 blade Scout knife, which was advertised as having 440C blades. Once again, the blade is etched "440A". I also regularly carry it, as well.
(My normal EDC is a large Stockman, a 4 blade Scout knife or SAK "Huntsman", and a Buck 110 or Old Timer 7OT.)
One of the main reasons I bought these Böker knives was because they had 440C blades.
I am disappointed they are not 440C, however, I have no intentions of returning them, or not using them.
It is possible there was a Typo on the packaging. It is also possible the wrong blade etch was used.
It would not be the first time a blade had the wrong tang stamp. I know when the Colt carbon steel knives were moved over to the Rough Rider line, they had a "440A" tang stamp for the first few months, even though the blades were carbon steel.
This was corrected after SMKW was made aware of the discrepancy, and the proper tang stamp is being used now.