Vintage Unbranded Possibly US Navy 28V DC Aircraft Testing Power Supply Tested Unbranded 28V DC aircraft testing power supply Possibly US Navy surplus Voltage output measures at 27.4V Multi-meter shown is not included Pre-owned vintage condition with signs of use or age Please refer to the photos for the actual condition. We're happy to offer combined shipping! Buy each item separately, then message us. We'll combine the shipping and refund any excess charges. We list pre-owned items as ?Acceptable? or "Fair" when applicable, as?s condition system is subjective. Other items seen in photos or video (e.g., consoles, controllers, batteries, CDs, stands, shoe trees, rulers, etc.) are for display only and not included. Vintage items are 20+ years old. Even unused vintage items may degrade over time and could require servicing. They can fail unexpectedly. Tested items are evaluated for basic power and core functions only. We do not test every port or feature. Analog players (VCRs, cassette decks, etc.) may damage tapes. Use replaceable media for testing. Damage claims intended to mislead will be denied. Untested items have not been tested and are assumed to need repair or be for parts. Items may ship separately to reduce cost or meet weight limits. Orders $400+ will require adult signature. We reuse packaging to reduce waste and keep costs down. The following is?s automated AI-generated description and is not guaranteed to be accurate. We are not responsible for any errors or inaccuracies resulting from?s AI. The product is a vintage unbranded 28V DC aircraft testing power supply that has been tested and is in working condition. The power supply is possibly of US Navy origin, making it a unique and potentially historical item for collectors or enthusiasts. Its vintage nature adds to its charm and makes it a rare find for those interested in military equipment or aviation memorabilia.