YES.
I'm thinking it's a Craftsman, or waterloo, based on the seller saying the part number is 70666.With the exception it doesn’t have a lipped top, it looks identical to my proto side box.
That’s what my proto box is.I had a 28 or so drawer Proto 44 inch set once, pretty light duty apparently made by Waterloo. It looks just like that.
Thanks.That is a Proto number. They have used it for side boxes for many decades.