Thank you both for the replies and sorry about my delay in replying. The gearbox is stripped down to replace the agitater driving head and obviously I wish to replace the gearbox oil before reassembly. The machine is not part of a collection but is in regular use.
Thank you Rolls Rapide for the link for the Mobile Oil specifications.
Keith, could you please inform me where I could obtain a copy of the Service Manual for the Countess ?
All the Best,
Dave (Jim006)