Thanks guys. It is the later type, has same size inner and outer bearings. It was scrap before I 'attacked' it as the distance piece was badly pitted from sitting idle for years.
I have another question. Will a Stage One front stub axle fit? I've checked the parts catalogue and the part numbers for the Stage One stub axles are FRC3100 or FRC3917 (later). This is different to the Series 3 stub axle for which the part number is FRC3925. However, the part numbers for the bearings, hub seal, and hub are exactly the same for both the Stage One and Series 3 109 (post Oct 1980). The only difference I see is that the stage one stub axle has a copper bush as well as a rubber seal. Will the copper bush cause a problem?
The reason I ask is because I've managed to find a second hand Stage One Stub axle but not a Series 3 one.
Jason