I think those might be CX500C models, the Custom version that was modified rather than the CX500 or CX500 Deluxe models.
The tank on the Custom is more teardrop shaped than the Deluxe which is what a lot of cafe racers like with the mild knee dents from factory.
Here's some photos of CX500 (Std and Deluxe), Some CX500 Deluxe or Std cafe bikes, CX650Turbos, and CX500 Custom