I've found an old F & S Duomatic hub gear. It works but is quite dirty internally due to the disintegration of the dust cover on the sprocket side.
It has a 10.5mm axle and a grease nipple. From what I have found out so far there was at least one other type made later with a thinner axle.
Can anyone help with any servicing instructions in particular the types of grease recommended and any instructions on how much play to leave in the cones? Sachs part number for the grease would be fine if no more generic information is available. --