You can find three different No-Design 1950 50 cent coins...
1. The most common one, which in the later stages develops the die cracks through the Zero and in other places on the Reverse. You can tell this one as it has one dot just below the Unicorn's hoof. and has an incused die mark which can be found extending down from the three lion section of the shield to the top of the harp.
2. As above, (ie. one dot below the unicorn's hoof) without the die mark and it does not progress into the Die Crack stage.
3. The least often seen one has three dots just below the Unicorn's hoof.