According to the Nevadas Gaming Control Board, The following demoninations were approved back in Feb of this year:

$1
$2.50
$5.00
$25.00
$100.00
$500.00
$1,000.00

If you go to chipDB.com and pick Harrahs Casino Hotel Reno from the search page, then click on the 7th page in the result set, you'll see the info provided by the state. There are no images yet, but hopefully those will come soon.

Robert