This unit was used to reduce radio interference by the engine. I have a few of these for sale, this photo is a good representation of what you will get. May have extremely slight surface rust, but we will make sure to look through and find the best one. We have a massive selection of NOS and Reproduction Military Vehicle parts, so make sure to search our other listings to get everything you need.We are constantly adding new parts to our online list as well, so check back periodically. The item "Jeep Willys MB Ford GPW GPA WWII Jeep Radio Filterette G503 Military" is in sale since Wednesday, June 22, 2016. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Gauges". The seller is "armytankguy" and is located in College Station, Texas. This item can be shipped worldwide.