Dufor 8817

Can any of our Aussie friends with a Dufor catalogue confirm the use of parts in a set labeled Dufor 8817. The Dufor label was in a box together with what looks like a NOS kingpin set for a 1928 series 1 Essex or late 1927. Set consists of 2 Irwin thrust bearings (H 11) 2 x Kingpins 5 13/16 x 3/4 (o.751)", 2(only) bushes to fit (o/d 0.937) & 2 cotterpins.

thanks