I have posted several Corinthian helmets during the last months. This, however, is a Illyrian helmet in bronze, with unique silver decorations (the horses on the cheek-pieces and the lion vs. boar (as found a few pictures down here) on the forehead.). You can also see how it was intended to hold a crest on the top. The helmet was found in Olympia and is dated to ca 530 BC.
You can find some other helmets in these posts: Three Corinthian helmets, a boar tusk helmet, Athena with a Corinthian helmet (another one) and one last Corinthian helmet.