Gauge, Pressure

It is a brass pressure gauge with a glass front. There is a movable metal arrow in the centre of the gauge. The scale on the gauge goes from 0-200 in increments of 20. There is a threaded pipe attached to the bottom that has the number "677" on it. On the face of the gauge are the manufacturers information, "lbs pr Inch Bourdon Pressure Gauge Steam Belliss & Morcom Ltd. Engineers Birmingham No.78212" There are three holes on the bottom edge of the metal body.