9 27 Andersen sash balance

This is an Andersen window that is approximately 62 years old. I have exposed the sash balance and did my best to determine the markings w/o taking out of the window casing. To the best of my ability, the markings are as follows:

Right side: EE 9 27 74
Left side: DD 9 27 64

Hope this is enough to determine replacements

Does the 24-939 work for both the right and left side?

Thanks for the help!