The first "set and forget" alarm.  The shutoff switch would reset itself to the ON position 12 hours after you got up.   Oh, what fun for the first few Saturdays you owned it!  (There was another switch position to disable it for real.)  The other interesting thing about this clock was the low model number.  Somebody at G.E. realized they'd mysteriously skipped lots of numbers in the 30's and decided to use them.  That went on just long enough to confuse everybody, then they picked up numbering where they left off.