Looking at the buttons, it could be the same setting system as the Hamilton alarms.
If so, you set the hours, tens of mins (eg 10, 20 30..), and single minutes seperately. Press the 9 o'clock button once to get the hours flashing. Set with the 10 o'clock button. Press 9 o'clock again for the 'tens' part of the mins i.e. the 3 when the time is say 9:35. Press the 9 o'clock button again to set the single part of the minutes ( the 5 in our 9:35 example). To activate the alarm press the 10 o'clock button twice and the alarm time will flash briefly to confirm it's been activated. Dont expect the alarm to wake the neighbours tho, I think it'll be fairly quiet. Hope that helps.