Opus One
- Sire: Rivercity's Quenton Cassidy
- Dam: Brandenburg Concerto Opus One
- Registration #: AKC SN73424301
- Date of Birth: 25 Apr 2000
- Date of Death: 2006
- Breed: Shorthair
- Country: United States
Health Information
- Hipscore/Pennhip: OFA-Good
- Cause of Death: Cancer, haemangiosarcoma