The poker chip looks like a roulette wheel, and has an inscription on both sides, written in Morse code.
On the Lucky 38 side, It lists the date 23, 2077 (the year of the great war) and on the 200 side it lists the date 11, 2281 (the Date that New Vegas begins).

Cool :tops:

(Now we all get to scour the game for other secrets... Anyone find some?)

:rofl: I take it by the sudden influx then immediate egress that this must be old news.
(It was news to me, as I only just recognized it a few minutes ago)