ok here goes
 
i have a diff which is definitely lsd buttttttttttt both cv's run the same way and u "cannot" stop one turning.  No it's not welded or else they're the most magnificent invisible welds i've ever seen.  Now it doesn't appear that it's a torson (in a way) coz the cog wheel thingy is no where near the size of John's one (Type R Supra) but heres a few links to some pics i took of it, i would appreciate any enlightenment on this diff :)
 
www.spite.co.nz/diff1.jpg
www.spite.co.nz/diff2.jpg
www.spite.co.nz/diff3.jpg
 
Cheers
 
Suze