Randy,
Thanks for the compliment! I actually don't have much of a background other then doing some restoration for family and friends, etc. I just enjoy doing it.
I've found that with these old photos if you adjust the red, green, blue color input levels individually to eliminate any area of the graph that shows no color input you begin to get close.
View attachment 103941
With this picture I then went into the color curves manager and, again, adjusted the red, green, blue curves individually to add or remove color as needed. I pulled out red and added a little green and blue.
View attachment 103942
Last the white was a little too bright so went into brightness&contrast to darken the image a little.