Atlas Rocket Intervalometer made by the American Gyro Corporation out of Santa Monica, California, designed for timing sequential events. The piece measures 5 x 5 x 8.5, with a part label to top that reads: “Rocket Intervalometer, Model IV-200 Serial CF3-16-64, Convair Spec. 8-06311-E, Mfg. Part No. 5000.” Date-stamped below: “JUN 66.” The front of the cylinder features two 1.75 inch connection ports. In fine condition, with some scattered marks and wear to paint.