My right handed Pan Am Window crank looks like the 39-017. The top holes 1/2" apart and bottom holes 1 5/16" are the same as mine. The difference is between the top holes and bottom on the 39-017 are 5 1/4", mine are 5 1/8". The 2 3/8" arm on the 39-017 are 2 9/16" on mine and there are no threads. There is a 3/8"shoulder bolt with 5/16" threads that goes through the arm and screws into the window arm. On one side is the name Pan Am and on the other is a #60. I talked to Steve Friday 2/10 and he said to give you a try. Thank you for your help. If you need additional info, my name is RonnieĀ
![Crank Picture #1](images/pictures/2023/02/625488.jpg)
![Crank Picture # 2](images/pictures/2023/02/625489.jpg)
![Crank Picture # 3](images/pictures/2023/02/625490.jpg)
![Crank Picture # 4](images/pictures/2023/02/625491.jpg)
![Crank Picture # 5](images/pictures/2023/02/625492.jpg)