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Buy here: http://www.esslinger.com/horotec-watch-tester-electronic-pulse-tester-for-circuit-and-coil/
This Horotec Pulse tester checks the electronic parts in analog watches. This particular tester was designed to test the coils and circuits of the watches. To test, place the watch in the middle of the tester and without opening the watch, it will tell you if there is a pulse.
• Electronic pulsar tester
• Tests circuit and coil without having to open the watch case
• Product size 6" X 5" X 2.6" Inches (151 X 127 X 65mm)
• Product weight 7.3 oz.
• 9 V. Battery included