Second hand Back to Stationary engines

Reversing compound twin with condenser pump - stock code 7771

An interesting small compound marine engine, of freelance design with Stephenson's reversing gear and fitted with condenser pump. Unused in many years it turns over fairly stiffly although without tight spots - more lack of lubrication than deficiency of construction we think. Valve eccentrics need resetting, it will turn over half a turn before needing some steam at t'other end of the cylinder.
length/inches 9
width/inches 9
height/inches 10
weight/kg 6
cylinder material gunmetal
valve type slide
valve gear Stephensons
reverser type screw