Thanks George. I have a copy of Hawthorns original engine contracts and they are both clearly listed. I have also a copy of the original Doxford engine works contracts and they are both listed in there as well. I have manged to find out why. The contracts were Doxfords, Pallion, who were unable to complete them and subcontracted them to Hawthorn Leslie, who, as you will know, built dozens of Doxford engines under licence. Doxfords had two crankshafts built at Kobe Steelworks in Japan in the late 1960.s, early 1970s. I am almost certain that one was for the Sheaf Crest and the other for the Sheaf Field.it was at that time, having built the crankshafts that Kobe approached Doxfords to build Doxford engines under licence. I am not at liberty to say why, but Doxfords declined. You are correct, they were Hawthorn Leslie built though it is very likely that Doxfords did supply some of the components. thanks for taking the trouble to answer, it compelled me to find out why and my records are now amended.
Accuracy is a prerequisite, not an optional extra !!
Tom