Unmarked 5x7 Reducing Spring Back for 8x10 Large Format Camera.  Exterior dimensions: 11.5" x 11.5" Comes with the original 3 mounting screws.  Shows wear to the wood finish with scratches, rubs, small chips and some tape residue.  Spring back works as designed.  As found in local estate.  Please see photos for more details and to evaluate condition for yourself