Great. That helps tremendously.
I don't think this film is in bad shape as far as the color grade goes, so you only need to make very light adjustments. What I am proposing is basically the steps I would start with for every color alteration. My advice is always start small.
Also, if I may,
*pushes glasses up* - you are regrading the film, not correcting it
I always add:
color balance - small adjustments to the midtones
color balance (yes, a second instance of this filter) - small adjustments to the highlights
levels - small adjustments to gamma and levels
That's all you need for this. And the adjustments I propose are small enough that you can probably get away with doing a single movie-wide color treatment. You may need to make a few small adjustments here and there, but I don't think you need a heavy re-grade of every shot.
Here are screenshots of the settings:
and the results:
and for direct comparison, here is a screenshotcomparison.com view of that first image:
http://screenshotcomparison.com/comparison/128027
NOTE: Since you are editing the color, and there are small black bars on the image to get it to the final scope, I would crop your video track to remove the black bars burned into the image. That way, your small black bars will be truly black upon render.