Designer moving mechanisms Timer for 20 minutes, vinyl 107 parts

One of the most beautiful models of tm UGEARS timer for 20 minutes. This is a mechanical chronometer that can be set for the right time from one to 20 minutes. If you start the warning mechanism, then after time there will be a sound. The timer has an unusual roller pendulum and an amplitude adjustment handle that is located on the rear wall. It works from ordinary stationery gum. We have been improving this model for a long time so that everyone can assemble this beautiful clockwork.