Model Timer for 20 min

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 selfassembly without glue. Size Model: 6, 8 3, 15 10 in