This was known as the Moline Knight between 1914-19 and then became the R&V Knight in 1920. Produced by the R&V Division of the Root and Vandervoort Engineering Co., East Moline, Ill. Production never exceeded 760 per year.
NPPB
• Size; The cap has an outside diameter of 2 7/8” and is 1 1/2” high with 2 9/16”- 16 threads per inch. It is 2 1/16" across the flats.
