Model of Davey-Paxman (1885) steam engine slide valve for variable expansion
Model of Davey-Paxman (1885) steam engine slide valve for variable expansion, on fitting, arranged with 5 others for driving and adjusting by hand
Model of Davey-Paxman (1885) steam engine slide valve for variable expansion, on fitting, arranged with 5 others for driving and adjusting by hand