L-1011 models

I have seen mention of different L-1011 models. Some are called L-1011-385-1, L-1011-1, and L-1011-1-15(100). Can someone explain the difference between these models? The reason I am asking is because I have two different panels for the L-1011 in FS98. One has analog dials and one has vertical bars to display the engine output. I think the one with the dials is for the L-1011-1 and L-1011-500, while the one with vertical bars if for the L-1011-250 and L-1011-385-1. Any additional information would be greatly appreciated. Thanks.