E. Ingraham Duplex No.3

 E. Ingraham Duplex No. 3 : back to top The regulator is located above the 12 on the dial: turn it to the right to make the clock run slower or to the left to make the clock run faster ( 1 turn = about 5 minutes in 24 hours) The pendulum length when the clock is keeping time is 5 ¼inches (plus or minus 1/32 inch) measured from the centerpost to the bottom of the pendulum bob. The pendulum weighs 2 ounces , has a diameter of 1 5/8 inches and a thickness or .25 inches. The clock takes a # 65 key ; the label in the back says : E.