An early saturated boiler version sporting a safety valve bonnet with Ramsbottom valve, dual whistles, injectors on the outside of the boiler and a smokebox wheel handle.
This version has slide valves rather than piston valves, hence the altered smokebox front. Note that the safety bonnet has gone and been replaced with a platform mounting two Ross safety valves and the brake gear is now mounted outside of the driving wheels.
Finally the extended smokebox and dome mounted further back shows that this version has a superheated boiler. Also seen is a Gresley anti-vacuum valve along with a "wind jabber" behind and on top of the chimney respectively. A mechanical lubricator has been fitted on the right hand side, driven externally by the centre wheels, these were also driven between the frames on some versions which will also be an available option. Finally the safety valves are now mounted directly to the boiler and the whistles on the roof have been replaced by a single whistle in front of the cab sheet.
More work in progress to come next week.
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