Saw this on an auction site:

Lionel factory layout elevation
appears to be from a D-198 Standard Gauge Layout, includes large elevation, corner elevation, 8 separate trees, 3 smaller grassed elevations that probably belong to another display as they are later variations. Main section has been rewired, overall C6-7 Unusual!
And a prewar factory layout:

Scarce LIONEL Factory Layout 1066E:
Circa 1935, debuting the 1700 Streamliner. 44 X 30" Table Top Layout including 913 Landscaped Bungalow, missing 2 trees, hedges worn; Scarce 4 separate-sale trees; Tunnel shrunk a bit with age, 48W Whistling Station(instead of Transformer station); Track; 1700 Diesel; 1701 Coach & 1702 Obsv., Has original vintage hand painted background panel, all show playwear, but scarce early display!