The mystery has been solved. We found this in our over 100 year old barn and had no clue what it is for. We listed it on craigslist and within a week someone let us know what it was. They sell on Ebay for over $100. It has a hinge and a clip that latches it closed. Carrying handle and a hole there you can mount it on a wall or surface. To metal pieces that are for sorting. Call (before 6pm) or text Ilene at 5ZERO33190THREE48. I do not check email often please call or text. Antique Nail Sorter Carpenters Box Crate Makers Old Vintage Woodworking Tool