Brakes look like cobaltos minus the "gem".
vjp
Colbalto's and Super Record calipers from the same period used the same arms, the levers if part of the brake set point to Super Record, not Colbalto.
At the time, if one did not want or need the white soft parts and or aero cable routing option, Super Record's were cheaper.
The 1984 crankset will have some interest as it was basically before C Record was readily available.
The front derailleur shown is the first production unit, there was a different one shown in the ensemble shot introducing the group, but I have never seen one in real life.... the production unit looks better.
I have slowly pieced together a Corsa Record group, but just can't pop for the Deltas, too steep a price for my view of them, a fun experiment, but dual pivots look more appealing... I have one colbalto caliper, I forgot how I got that long ago, and the plastic "jewel" is just silly.