I think Rick and kai have each (gently) raised the issue of whether the VOC and A stamps on this blade may have been added at a later time. The 1790 date stamp would indicate that it was made late in the existence of the VOC, a mere 10 years before it was dismantled and replaced by the Dutch government.
Looking at
other examples posted in this forum of VOC blades made in Amsterdam, I would add that the stamped majuscule "A "found on this blade is of a form not shown on other VOC Amsterdam blades of a similar period. On the example shown here, the A has a straight cross piece, whereas on the examples shown in the link to other Amsterdam swords the A has a two-part cross piece that is angled ("v"). (This letter has a specific name that I don't recall but was in use throughout the period of the VOC as best I know.) This feature was mentioned
here by Jim.
I agree with kai's sentiment that the date, VOC, and A stamps could have been added after manufacture, albeit many years ago.