This isn't a particularly old piece, but we love it anyway... cute and country, and American made! It's a long flower box basket, marked Kochbasket - Wapakoneta Ohio - Made in USA. This has a heavy plastic liner box inside, so you'll be able to actually use it for your plants.
The basket measures 18 3/4" x 9" at the rim, and the removable plastic flower box measures 14 1/2" x 4 1/2" across the inside at the bottom (the narrowest part). It's 5" deep.
Both pieces are in very nice condition, though there are some soil marks to the plastic box from use.