I was asked earlier this year to make a smallish train letterbox for a client. I did that and when I was looking through my pile of metal an old sewing machine called to me and said ” I could be an engine too”. My engineer Grandad used to drive a small engine ( sort of like this) at a timber mill at Britannia Creek . Most of this design has developed around the form of the sewing machine and other bits to hand  .I have included a piece of rail as the area to shovel in coal and a rail plate as the support for the engine. A friend dropped off a group of the rail hold downs (?) just before I started making this so I used one as the hook at the back. Just fun and decreasing my pile!