Model Catalog: CLINAC IX (Lot serial: Contact manufacturer.); Model Catalog: CLINAC IX (Lot serial: >10 serial numbers.); Model Catalog: 23EX (Lot serial: >10 serial numbers.); Model Catalog: 21EX (Lot serial: >10 serial numbers.); Model Catalog: 2100C/D (Lot serial: >10 serial numbers.); Model Catalog: 2300C/D (Lot serial: >10 serial numbers.); Model Catalog: 21EX (Lot serial: Contact manufacturer.); Model Catalog: 23EX (Lot serial: Contact manufacturer.); Model Catalog: 2100C/D (Lot serial: Contact manufacturer.); Model Catalog: 2300C/D (Lot serial: Contact manufacturer.); Model Catalog: TRILOGY (Lot serial: H293883); Model Catalog: TRILOGY (Lot serial: H294403); Model Catalog: TRILOGY (Lot serial: H291172); Model Catalog: TRILOGY (Lot serial: H294134); Model Catalog: TRILOGY (Lot serial: H140836); Model Catalog: TRILOGY (Lot serial: H291166); Model Catalog: TRILOGY (Lot serial: H293787)