Most collectors don't give the Lionel 259/259E a second look, but I find them terrific. Here's three examples from the shelves:
I think the top one is legit first-gen 259E from 1932. It ticks the boxes for copper/brass trim, red pilot/trailer wheels, red spoked drivers, and the little four-wheel tender with copper journals, all in black.
The middle one is a bit unusual, a 259 which I believe Lionel cranked out in 1935 from bits laying around. It has the slot in the top of the boiler for an E-unit lever, but the manual reversing lever on this loco is in the cab. Nickel trim, eight-wheel caboose, all in black.
Not sure about the pedigree on the bottom one. I consider this to be 1936, although I'm not sure about the date of introduction of the thin-rimmed blackened drivers. Coffin-style tender, all in gunmetal.
Correct me if you know more/better. There's a lot of variation with this stuff, so my presumed dates could very well be off a bit.