Class 16DA 4-6-2 no. 879 was built with Caprotti valve gear for experimental purposes. This rotary poppet valve gear was driven from a single gearbox on the centre of the driving axle. It was eventually replaced with the standard Walschaerts valve gear in 1940.
Henschel works picture
circa 1930 <div style="display: none;">date QS:P,+1930-00-00T00:00:00Z/9,P1480,Q5727902</div>
Leith Paxton collection