Our window operator, which we affectionately call the Crooked Little Window Operator, is a replacement for the Hehr 008-101 operator used in the center of the small Hehr Standard vent windows (model 618) on 1950s Airstreams, Silver Streaks and others. Vent windows are short window less than 10" high. If your window did not have a crooked arm operator on it originally, this is probably not right for you.
The base measures 1/2" wide and 1" high. It is 5-1/2" long and mounting holes are 5-1/8" apart center to center. When extended in the fully open position, the length of the arm from the base to the center of the hole in the end is approximately 4-3/8". See if your holes will line up.
Hehr's original version of this operator is shown in our last photo above.
We include a swivel handle and one nylon friction pad (VTS-348) for the tip at no charge. Screws for mounting are not included.