If it is the red tool box, then I have the same Craftsman 26 inch wide 9 drawer bottom tool box as part of my garage tool box setup. I also have the 8 drawer upper tool box that has the lid, and a center two drawer intermediate box.
I bought the bottom box and upper tool box back in 1992 when I bought my Jeep CJ-7. I wanted a tool box combo that would hold all my tools for working on the Jeep, and it has proven to be a great investment.
The center two drawer intermediate box was purchased 5 years ago back in 2014 and it has been a great addition to my set. I needed a few more drawers to hold some new tools so I went back to Sears to get the center box.
The only difference I can see in the 2014 box is that the drawers are black, where as the drawers on the bottom box and upper tool box are more of a very dark gray color. I don't know of the color faded a bit over the years on the older boxes, but you can see difference. Although it is hard to see unless you know it is there.
The red color is exactly the same on both the old and new boxes, so that is nice. Also, even though there is 22 years between purchasing the boxes, the newer center box is still made from the same thickness metal as the original boxes. So that was a plus when buying it.
If your dad did not already have this, I would suggest you get some rubber drawer liners to put in the drawers. I put that in as soon as I got the boxes and it has really helped keep the tools from sliding around when you open and close the drawers.
Those Craftsman tool boxes are really nice I have to say. The metal seems to be thicker than most of the tool boxes I see around today. And the drawers can hold a lot of heavy stuff. I know I have a few of them overloaded with tools, but they still function smooth.
Once you get yours cleaned up and filled with tools, you will be able to enjoy it for decades to come, just like your dad did. Every time you take out a tool, or put one away, it will remind you of your dad!
Below is my Craftsman tool box set up in my garage. If you look, you can see the slight difference in the color of the drawers on the center box.
And just for reference, yes, I can see into the top tool box just fine. My 5'-3" wife can not!
Jim