The Ford Tractor Implement Lamp, or Worklight, was introduced in early 1949 at the same time the switch was made from the TAURUS taillight to the DUOLAMP taillight. The part number for the bulb itself is 8N15514 and new, replacement bulbs are shown below. One is made by General Electric and the other is made by Westinghouse with industry part number of R11. The GE bulb also has 1133 E17 on it. It is a 6V, 24W unit, called High Intensity 'S.C. Bayonet Base' style.
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