From The Standard Catalog of Lionel Trains 1900-1942 by David Doyle.
“Basically a renumbered late 1911. The bodies were usually rubber-stamped “NEW - YORK - CENTRAL - LINES”, either in block lettering or inside an oval logo.”
“The earliest 38s have “Lionel Mfg.” nameplates, turned handrail stanchions and vent holes in the end doors. Mid-production locomotives retained the door vents and “Lionel Mfg.” markings, but the handrail stanchions were crimped. The final production locomotives had stamped Y-shaped handrail stanchions and plates replaced the vents in the doors. This version of thje locomotive was made with either “Lionel Mfg.” or “Lionel Corp.” nameplates.”
Type 1: Dark olive, rubber stamped “PENN R.R.”, red window and body edge trim, small creased hook couplers.
Type 2: NYC, turned stanchions, vent hole doors, black.
Type 3: NYC, turned stanchions, vent hole doors, gray.
Type 4: NYC, turned stanchions, vent hole doors, maroon.
Type 5: NYC, turned stanchions, vent hole doors, dark green.
Type 6: Same as type 1 but with strap headlight. Dark olive.
Type 7: Similar to type 1 but with strap headlight. Brown.
Type 8: Factory repaints. Known legitimate colors: red, mojave, pea green, peacock and red with cream trim.
Another great resource is Greenberg’s Guide to Lionel Trains 1901-1942 by Bruce C. Greenberg. I have the 1994 edition. Using this table on couplers can help date a loco. Quote:
- Short (5/16") and long (1/2") straight hooks (1906-1914)
- Short and long crinkle hooks; the crinkle at the bent end helped keep the coupler from popping out of the coupler slot (1910-1918)
- Hook with ears; two projecting ears appear on the bottom of the bent end (1914-1926)
- Combination Latch