Time will tell I guess
Listing states: New: A brand-new, unused, unopened and undamaged item in original retail packaging (where packaging is applicable). If the item comes direct from a manufacturer, it may be delivered in non-retail packaging, such as a plain or unprinted box or plastic bag. See the seller's listing for full details
And it came with a 25 year guarantee
Maybe that is what the standard Ebay words say.
But how did it come to you?