The 9/99 revision of the Source Four Jr. assembly guide (part number 7062m1006), the color of the dots that identify the three jr lenses are mislabeled.
The correct order is:
7062A4001 Lens, 26º, yellow
7062A4002 Lens, 36º, white
7062A4003 Lens, 50º, black
Currently, the 26 and 50 degree colors are switched.
This has been corrected in later versions of the assembly guide.