.......dunno, but Steve has it sussed
LP = Les Paul
N = Nashville
STD = Standard
P = Plus
TS = Tea Burst
CH = Chrome hardware
1 = First run (Not a second)
For what it's worth mine is LPNSTDPLHSCH1
Easy enough from Steve's post to work out that I have a Nashville standard, plus, left hand, heritage sunburst with chrome hardware, 1st run