4 Les Paul models comparison pt.1 drive 

1978 Custom, T-top (front) / Duncan APH-2 (Bridge)
1993 Classic, Slash 2.0 (front) / Slash 2.0 (Bridge)
1998 R7, 57Classic (front) / 57Classic (Bridge)
2008 R0, Duncan APH-1 (front) / Duncan APH-1 (Bridge)
Which one is which guitar?
The order of the sample is not related to the order of the guitars placed next to it.