Wood (probably pine), glass
Overall: 26 x 14 x 2 in. ( 66 x 35.6 x 5.1 cm )
painted: on frame: "Atlantic/No. 511/National Washboard Co./Chincago - - Memphis"
cast: on glass: "National"
Wood frame washboard with textured glass board or pane.
Due to ongoing research, information about this object is subject to change.