Thanks all. I added a couple more. Note that the James Montgomery Flagg "I want you for..." is from 1967, not a 1917 original. There aren't too many from 1967 and before though. I read from somewhere that Flagg modeled the uncle sam image after himself. What an awesome look.
One of my favorites is the Marina Militare from 1955-56 for recruitment in the italian navy. Its got a minor hole (burn) but is on linen and looks remarkable. To me, one of the greatest work of art and poster designs out there, from the layout, to the language font, to the message etc. Makes me want to jump on a tall ship and see the world. Damn mortgage. The blues really come out in real life, picture just doesn't do it justice.
Also the Men Wanted for the Army, a Michael Whelan from 1908 - my first poster ever which i bought on June 11 one year ago. Pre-WW1 - so no army greens here but uniforms of the union blue. Also note the cavalry uniforms being different from the infantry. The background looks like its from south or west plains - when America was out conquering ALL of its territory. There are 3 more of this series, but this is the rarest and most sought version.
Finally, my big f-cking eagle poster...from the 70s with a provenance yet unknown. American propaganda at its finest!