|Bright and Shiny, almost new looking|
One point of interest surprised me and that was that the cast item in the picture is Aluminium and not iron or steel. It is thus quite a manageable weight to lift open. There is also a steel plate hidden behind which covers the fire-hole and prevents the Aluminium from melting.
The arm on the right is to latch on to a bracket to hold the door closed.
In use, when the door is closed, air is prevented from being pulled in through the fire-hole above the fire. Whilst a small amount of top air will reduce smoke, it also bypasses the air path through the fire grate and will reduce the heat output.