Kevindale- you will find other anomalies too in the 80's catalogs. The release brochure for the Corsa Record shows a front derailleur that never made production but it is shown in a nicely printed 4 color printed photograph…

Consider this- the Nuovo Super Record seat post is released, one bolt, new, different, what do you do with the fluted Record style two bolt pillars in inventory? Throw them down a notch and use up the inventory. This happened elsewhere to bits here and there.
The first short reach calipers, First seen in 1974, had an cable adjuster of all aluminum with a knurled edge, the caliper had a small inserted rubber bumper to protect the frame instead, soon dropped and retuned to the initial "O" ring design. The piccolo calipers did not really show up on the bike shop shelves for 18-24 months. These all metal adjusters would surface again in about 5 years on the G.S. brake calipers. So it goes.