Alf and Ralph claim to have given up $1.50/hour jobs as astrophysicists in Bleedswell to build airplanes in Hooterville.
The Hooterville Airplane Company built the JN-4, known as the "Jenny."
The Hooterville Airplane Company had a contract with the US Army (dated January, 1918) to build 32 planes, but they only delivered 26. That leaves the factory six more to build.
Adjusted for inflation, the $7 Mr. Haney charges Mr. Douglas for the badge would equal approximately $64 in the year 2023. The $1.50/hour salary Alf and Ralf claim to have given up would equal approximately $13.75.
This is the fourth of 15 appearances Robert Foulk makes in the series. In his first 11 appearances, he plays Hooterville farmer Roy Trendell; in his last four appearances, all in season six, he also plays a farmer, but farmer Wheeler, the father of Eb's girlfriend Darlene.