Vintage Alarm Clock Jigsaw

If you didn't know, a traditional mechanical alarm clock, like the one in today's puzzle, has one or two bells that ring by means of a mainspring that powers a gear to quickly move a hammer back and forth between the two bells. It also has an extra hand or inset dial that is used to specify the time at which the alarm will ring. User-settable mechanical alarm clocks date back at least to 15th-century Europe. After enabling piece rotation you can rotate a piece by double clicking/ tapping on it or pressing the space key while dragging the piece.

After enabling piece rotation you can rotate a piece by double clicking/ tapping on it or pressing the space key while dragging the piece.