Generator Fan
The item on the left is the cooling fan from the front of the 110volt generator on the FIG. The thing that looks like a small spring washer above it is actually the centre of the fan that has sheared out of disc.
Now where are you going to get a replacement for a 1988 generator fan within 24 hours? Answer, Droitwich Auto Electrics, who sourced the replacment on the right in less than a day. Highly recommended.