pair of antique adjustable architectural heating register grates vents

Pair of old Craftsman Mission vintage, architectural heating and ventilation registers. These registers have an adjustable vent that can be opened and closed by turning the cast iron knob. The registers are made of stamped steel. They measure about 16" wide across the grill and 14" high. The registers measure from about 1-3/8" to 2-3/4" deep (out from the wall). They have old black paint and light rust.