Check the listing for details. Vintage AN/URQ-10 Precision NAVY Frequency Standard. Condition: For parts or not working. Listed at 275.00 USD. Here is a URQ-10 of mine that I have had sitting for some time now. It worked fine years ago but I have not used it for 16 years. The battery pack was bad when I got it from the DRMO so it was removed by an old Navy Technician friend, John Jolly (Hi John!). He checked it out and said it was OK otherwise. However, I know how old electronics can be so I am selling it "As-Is" because I do not want anyone upset. Probably needs a capacitor or two by now, as well as a good dusting/external cleaning! This example was made by Bunker-Ramo (I looked up the cage code). It will provide 100 KHz, 1 MHz and 5 MHz for your lab. This one looks in better condition than any other on eBay and at much less money. I have not seen any military frequency standards in a long time!