Peter Braczko lists the prototype 2-ring model of the 80-200/2.8 ED as being made in late 1978, and presented at PhotoKina that year. No details of numbers except for the statement ".. remained a prototype as only a very few of them were sold". It is said to be a 12/9 design weighing 1.7 kg and having ED glass. Filter thread a whopping 86 mm.
This corresponds to Roland Vink's entry of a prototype 80-200/ED 2-ring for 1978, serial numbers unknown.
The production model was a massive push-pull zoom 80-200/2.8 ED AIS in 1982, featuring beautiful workmanship, 15/11 optical design, weight 1.9 kg, and an even bigger front thread now of 95 mm size. About 1500 of them were made before the onslaught of the AF models commenced a few years later. I own one nice sample and its optical quality is first rate. Due to its heft, it thrives best on a tripod.