Pibal Timer
WK-22-4850
Designed with a signal buzzer that sounds when the sweep second hand reaches the 50 second dial graduation and again sounds when the second hand reaches the zero graduation. The 7½″ diameter dial reads to single seconds, numbered every 5 seconds. Operates on 90 to 130 volts, 60 cycle, AC power. Provides 6.3 volt AC power receptacle to supply power for the theodolite WK-20-8500 illuminating system. Size: 8¾″ x 8¾″ x 37″. Dial diameter: 7½″.
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