I THINK the 7mm STE is the Shooting Times Easterner. There's also a line called the STW, Shooting Times Westerner.
The Easterner cartridges are for lever guns, the STWs are seriously potent cartridges for bolt rifles.
Yep, here you go, Pal.
Google and ye shall receive:
http://www.reloadbench.com/cartridges/w7mmste.html
Layne Simpson designed the STE.