A mixture, I think, of a part-built and a part-dismantled LNER V4 to LBSC's "Bantam Cock" design. There is a chassis with some motion work and a set of cylinders fitted, complete with pistons and valves. What appears to be a used grate and ashpan, most of a smokebox assembly and some platework including the cab and running boards. There are a set of erected frames for the tender along with some machined axleboxes and wheel castings for same.
There is a box of bits included, which contains various bits of a motion work and a spare set of cylinders.
The boiler is unused, commercially-produced item, silver-soldered throughout.
When done, the engine will look something like this.
gauge | 3 1/2 inch |