ZW-C should probably point out the Lionel Manufacturer Number (Lionel 6-32930).
Same for the ZW-L (Lionel 6-37921)
Should add an entry for the ZW-R, ZW (R), or ZW Model R - natural evolution of the ZW - most notably uses 18V (#1445) indicator lamps instead of 6V (#51).
It boils my blood when someone calls a ZW-C or ZW-L a ZW - they aren't!