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The pump on a Seal A Meal will not be able to draw all the air from between the scales out because the bag cannot squeeze into that space. You would need to purge the bag with pure nitrogen first (I...

If you don't plan to open the box very often for the next 15 years or so, you will need to take extraordinary precautions against corrosion. +1 on the suggestion to keep your son's gift box in a bank...