Frequent contributor Bob W. offered the latest addition to his collection of Willys literature. This receipt was tucked in a 1961 CJ-5 owner's manual. While the date was very hard to read, Bob said it appeared to be August 2, 1966. The parts and labor listed were for the replacement on the Jeep's exhaust system, for a whopping $18.43:

Note the very top of the receipt reads "Established 1931". It is unknown if the company was a Willys dealer since that time. The K-F Dealer List shows them as a Willys dealer at least as early as 1952.