| 001 | RF Connectors on Rear Panel |
| 002 | High stability Internal Reference |
| 003 | Connections for Ext. local Osc |
| 004 | Operation from 48hz to 440Hz Power Line |
| 010 | AM & FM Calibrators |
| 0Q8 | Factory Delivered Service Training |
| 907 | FRONT HANDLE KIT |
| 908 | Rack Flange Kit for Use without Handles |
| 909 | Front Handle & Rack Flange Kit |
| 910 | Additional operating and service manual |
| 915 | Additional Service Manual |
| H09 | SPECIAL: SW SPEEDS UP MACHINE (NOTES!) |
| UK6 | Commercial calibration with test results data |