I have responded to several questions about Busse Basics over the years.
Mostly having to do with the steel.
There are two Basic runs(Pun intended) Smooth and Crinkled.
With the largest difference between the two being the Belly depth on the Basic number 3 and up to about a half inch variance in length in some of the knives(not just the 3)
In the Begining Jerry Said "Let all Busse Sheaths be Equal" and it was so.
High Desert Low Ride with a tie down for the leg and a Belt dis-connect for the two larger Basics, the #7 and the #9.
Factory Kydex for the #3 and the #5, pretty good Stuff Maynard.
Then came the clash.
Basics in Leather(Still prefered by some) with Non-Basics in either Factory Kydex or Plastic lined cordura with a handy pouch (Pretty when new but not as durable)
Then Jerry said once Again, " Let all Busse Sheaths be Equal and it was so,
Gone was the Leather, and Cordura with Handy Pouches and Eyelets for Tie downs Ruled the day.
For a While the Basics were in All Black cordura with the Standards knives in the green.
Edited to add.
There are Basics with Factory Penetrator points, there are a few Factory Basics with Teeth, I mean Serrations, small Choils, large choils and a couple with Really really BIG Choils.
I keep one complete set of crinkle in Cordura, a Basic #3 for a Beater, a Basic #5 in Buy Brown Custom Kydex for my wife's Bugout bag, a Basic #9 to loan out to Teeners when Camping and after the Blade West this year my Wife Decided She wanted a Basic #9 for use in the yard now that we are surrounded by Pine trees.
Other than that my Basics Ebb and flow.
I am Giving away a Basic #7 and a Basic #9 in High Desert Low ride this year sometime between now and Christmas one to a Sgt in the Airforce who had signed up for a job that will be getting him Flight pay.
These knives are Way to Cheap to buy, So I just keep buying them and so they tend to get given as Gifts pretty often.
Re-edited to add.
The toughest to find Basics are those with a Factory Satin Finish, like those used in the Tests.