Its Shimano, the ring has Shimano Biopace on it and the crank has Mountain LX.
The large ring has a peg, each other ring has a tab, if the tabs and the peg are aligned all 3 rings aligned equally.
There is no mark on the crank that I can intuitively say should be aligned with the peg on the large ring.

OK problem solved.
Found it here http://en.wikipedia.org/wiki/Biopace

All other references pointed to Sheldo browns site but I cannot seem to get access at the moment.
Thanks anyway.