A finely engineered model Stuart S50 single cylingder horizontal mill engine with blued steel clad cylingder 5/8in bore x 1½in stroke, bartype crosshead guides, counterbalance crank and spoked flywheel with correct 'v' belt grooves cast bed. Finished in green black and polished brightwork. Built by Tubal Cain as part of an article 'A Mill Engine for Beginners' to be published in Model Engineer August 1992, and 'The Manual of the Stuart Mill Engine' to be published by Argus Books Ltd -- 8½in (22cm) long