Selling an Antique Patent Nov. 7, 1876 J.F.W. Cast Iron Window Pivot Post Base for window transom.  The round pivot post is 1cm in diameter (3/8").  The bottom plate is 7/8" wide, 2-3/8" long with holes 1-1/2" apart on center. Ornate on top side - almost an Eastlake look.  Free shipping in the USA.