Being offered is this NASA Owned Nikon Speedlight SB28-DX Flash Unit Assembly, perhaps flown on the Space Shuttle??
This flash has the typical NASA Space Shuttle designation SED33104064-304 and serial number 5053, with Original NASA Government Property Barcode label. The flash has blue Velcro patches on three sides which would be used to secure the flash to the wall of the shuttle when in the weightlessness of space. Also includes NASA plastic storage bag.
Yellow display base is not included, and white inventory label is only shown for reference. I will include a copy of the label for your reference.
Overall condition is very good, please refer to the pictures for details.