A complete unmachined set of castings for a Stuart Turner 5A engine, complete with reversing gear and water pump. Bought many years ago, the complete set was left in the original cartons in a damp shed. In the intervening years, the cartons turned into a soggy mess, the castings all acquired a healthy dose of surface rust, most of which has now disappeared under the attention of a wire brush.
The largest engine in Stuart Models range at 2 1/4 x 2, it is rated at 5/8bhp - there are some pictures of a good one with pump and reversing gear in the archive.