A large time gun linked to clock in Scottish Observatory fires from Edinburgh castle.
Edinburgh Castle, Scotland.
L/S of Edinburgh taken from Castle Hill. L/S Castle Hill. L/S entrance to Edinburgh Castle. C/U time gun, M/S as two men manoeuvre it into position on the battlements. Various shots as a blank shell is loaded and the gun is fired automatically by electric impulse from a clock controlled from the Royal Scottish Observatory. M/S explosion. L/S of smoke pouring from battlements of castle. M/S as people check their watches. M/S of a man cleaning the gun out.