If you put a higher resolution picture of it open, maybe you'd get some help...???? could be it was made by the No-Name tool company
review this thread for simular ones ... and post your question there, better chance for an ID http://www.jalopyjournal.com/forum/showthread.php?t=146631&highlight=vintage+tool+boxes
I don't know who made your box. I can tell you that Snap-On and Proto both sold boxes that close with a panel like yours do.