I have a identical "Colonial Barlow" pictured below, with a different logo, it even has the same Patent number: 3,317,996. The Patent date is: 1965.
Often you will see this pattern and manufacturer with "Hollow Bolsters" which of course will lower the price and possible collector value. Our Barlows have "Solid Bolsters" Brass liners and Pins. Actually, a very well made knife.
As far as value goes, being that you have what is referred to as a "Double Collectible" that is: A near mint Barlow Knife with a R C Cola and Moon Pie Logo may add a little more value to the right collector. I would place the value between $20.00 & $25.00.
When I was around 13, my older Brother and a friend or two of ours would hunt down empty bottles with "Redemption Value" and take them to a local store, cash them in and purchase a large R C cola and a bag of Planter Salted Peanuts each, we would pour the peanuts into the R C and enjoy.
I preferred Pepsi, but R C was larger and less expensive.
Below is my Camillus (1941-1946) Cracked ice celluloid leg knife.
The Double-Cola product was developed in 1933 and soon became the company's flagship product. The product was named Double-Cola because its 12-ounce bottle were twice the size of other soda bottles being sold at the time. It was soon followed by flavored Double-Orange, Double-Lemon, and Double-Grape and "Double-Dry"
It's always important to know what you don't know.