This is an alarm clock.  The clock works and the alarm works.  I am convinced this is an important piece of Deco.  Because the style is so pure.  Just marble in a  right triangle, standing on 4 little balls like obelesks  do  Gild bronze birds.  It weighs 4 pounds.  I have opened it and will post pictures of the inside but could only find maybe a pencil mark but  no signature.