Broad face-plate, knurled cable adjusters, white-grey bellows, yellowing brake block adjusters - all standard 2nd generation stuff...
Second generation externals including tapered spacers to allow the caliper to clear the frame (first generation had symmetric spacers with inset for serrated washers on both sides), knurled cable adjusters (rather than the quick release) and clean transition from face-plate to caliper body on the undersurface (rather than a retaining clip for the face-plate).
Quick release on the brake lever (the first time Campagnolo did this and a function that is retained on current groupsets)
Some people incorrectly describe 1st generation deltas as "prototype" deltas thereby skipping a generation and calling these "first" generation deltas. The second generation delta brakes were the first of Campagnolo's delta configurations that worked without risk of catastrophic failure. For more detail see my first post in Aug 2008
BTW I should clarify that Campagnolo C record 1st generation components were never really "engraved" or "etched" in the sense that an cutting instrument was used to draw the logo into the surface of the metal. The winged wheel logos were stamped into the surface.
All pics taken from the ad by the Australian ebay seller