I removed this lubricator from an old full-size vertical engine some years ago and have kept it in reserve should the right project come along. It's very similar to the one fitted to Kew's Waddon horizontal cross compound engine, which looks lovely running - the ratchet-driven pump squeezes a drop of oil into the sight feeder every half minute or so.
It's missing its lid, for which I acquired a piece of brass some time ago, and the sight glass top fitting is broken - it need a new threaded piece turning up. Otherwise it's in good condition, one of the nicest looking lubricators I've come across.
Body 3 1/2 inches square
Height 7 inches