Model Timer for 20 min.

Discover more: One of the most amazing models tm UGEARS is a Timer for 20 minutes. This is a mechanical timepiece which can be set to the desired time of 1 to 20 minutes. If you start the alarm, over time you'll hear a sound. The timer has a unique roller pendulum and self adjustment system on the back wall. Our timer works from the usual clerical gum. For a long time we have improving this model so that everyone can collect this amazing clockwork! Model for self-as