That coin does have a date. The photos are a little too blurry for me though. Try one of these pages to determine the date: http://creounity.com/apps/time_machine/index.php?go=ethiopia.php&lang=en http://worldcoingallery.com/countries/Ethiopian.htm Christian
Depending on the denomination, here's a chance to win a bar bet; some of the wartime Ethiopian coins were struck at the Philadelphia mint.
