| | Manufacturer | Part No | Description | Available | Price |
| Buy | Eldorado | | 985-986: Microwave Frequency Counter Technical Manual. (108708) | 1 | $35.00 |
| Buy | Eldorado | | 1635: Digital Frequency Meter Technical Manual. (108709) | 1 | $35.00 |
| Buy | Eldorado | | 1650: Frequency Counter Technical Manual. (108710) | 1 | $35.00 |
| Buy | Eldorado | | 1810A: Digital Volt-Ohm Meter Technical Manual. (201132) | 1 | $30.00 |