A used Steel Rim Lock with Pressed Steel keep and Key - This is a Double Handed Lock so can be used on doors hinged on the right or left.
This is a reproduction lock and looks like its had very little use.
The latch and bolt are made of Brass.
Approx. Measurements:
Box Lock - 6 inches x 4 1/8 inches (152mm x 105mm)
Centre of Keyhole to Lock edge - 1 3/4 inches (45mm)
Centre of Spindle Socket to Lock edge - 4 1/8 inches (105mm)