PeteH,
When I sold the knives started during the change from A-2 to INFI.
There were knives with the High Desert Lowride(with leg strap) The High Desert High ride(No leg strap), Cordura with insert and pouch, and Busse made folded Kydex.
However, Steelhearts with the slotted screw handle fasteners came out of the shop for at least a year after the tube type fasteners came to be common.
During this time I figure a number of Sheathmakers submitted examples of sheathes they wanted to supply to Busse, and Sheaths were a bottleneck in production from time to time, so alot of different sheaths were shipped from the factory with the Steel Heart in question.
When knives needed shipped they were stuck in what ever sheaths could be found at the time. if it was on the shelf or in a box a knife would get put in it and it would show up at my door.
It was alot like Christmas

always surprises.
I never knew what the knives I would get would look like, or what sheaths
(If Any) I would get.
So, what was a factory Sheath is an interesting qustion.
Same with the Basic #9 and #7 and #3.