Thanks for all the help guys! I know the top box actually is a Snap on KRM-54 I think... But the bottom box looks to have a different color paint and I have been all over the bottom roller and cannot find a serial number or manufacturer. The top box and bottom roll-away do seem to have similar drawers but still do not look like a matching set.
The top box does have an identification number on the back:
Here are some more pictures of the bottom roll-away drawers:
And here is the only writing/sticker I have found on the entire roll-away, it is located on the inside of the top drawer:
I have torn apart the whole bottom roll-away and never found a serial number or model number but I did see the company that made the steel for the toolbox. On the inside it said ARMCO 15073 MI. Made in USA.
From what I know my dad actually purchased the top snapon box in the 1970s but the bottom roll-away was my grandfather's so I think it is a bit older.