I just looked this up: AF Zoom~NIKKOR 80-200/2.8 ED: 16 elements/11 groups, 3 ED elements., 2 lbs 10.3 oz-NO TRIPOD ring, ONE ring design.
2-Intro in 1992: the AF-D NIKKOR model of the 80-200/2.8ED: different limiter switch, 3.5 oz heavier.
3-AF-D NIKKOR 80-200 "two ring". Introduced Photkina 1996. NEW is an L-shaped tripod mount. 16 element design, new limiter switch design.
4-AF-S Zoom~NIKKOR 80200 f/2.8: Introduced at Photokina 1998: 3lb 2.8 oz without tripod bracket. Silent Wave focus motor focuses almost instantly;three "Focus Lock Buttons" on the lens barrel. NEW 18-element in 14 group optical design features Five ED-glass elements. Aperture diaphragm is now rounded, with 9 blades, for better out of focus rendering. Build includes aluminum casing and carbon fibre materials; this lens is compatible with Nikon's TC14e, TC17e, and TC20e AF-S type converters.