Daan, these are commonly found in SA, as you will know - sometimes in very good condition. BSA made them just after the Great War, as I udnerstand it, continuing a large contract which the UKicon govt no longer needed. They reverted to the Mk III style with cutoff; the fore-end may still have a swell for the long range sight. They seem very well made; they were shipped to various places including SA, where they picked up Union Defence Force markings, and seem to have been part of the stock of combat rifles for SA forces in WW2. The brass stock discs are usually blank. A regular forummer, TerryLee, in in Gauteng and knows an awful lot about these - unless Terry chips in, my suggestion would be to PM him.