Timestamps have arrived! Now you can find out when the elements on a Wayback Machine replayed page were captured:
The 's Wayback Machine now provides access to the time and date of every archived web page element
Yes, this seems crazy :) But as noted by web archives are never a 1:1 copy of the living web & the archiving process introduces lot of inconstancies, reconstructions of some hyperlinks, several temporalities in webpages, etc. See for example