Lockheed F-117A Nighthawk s/n 86-0838 Over Iraq, Titanium Skin Relic Display

I bought three of these at different times as gifts, and they all have different numbering which don’t correlate to the amount produced. I don’t know if the artist just cuts more into little pieces and expand the collection or what the deal is but I find this to be deceiving. I thought I was buying an Art piece that was one of thirty ever produced. The owner of 18/30, 27/50, 58/75,