Sorry people, the lockring doesn't have a model numer on it.
It has "SHIMANO HG HYPERGIDE C JAPAN US PAT. 4889521 LOCK 40N.m" on it only.
From memory it probably was an XT & the 4 larger cogs on a spider & most sprockets being drilled, it most likely is. That being the case, I have probably set the price too low, but never mind.
First to pm & pay gets it. PM sent to Development_Cycle as asked first.