Citizen Nighthawk 24 hour setting.

Hi everyone

I have a couple of Nighthawks which I have tried to set up the 24 hour clock as per the instructions. The one on the left seems to be bang on but the one on the right is off. I set them both up in the same way so can't see the problem. Does anyone know if there is a reset that I can do? Any suggestions greatly appreciated.

Regards Ed