Most of the Magic Chef's of older vintage work this way.
You turn the oven control on and with a BBQ lighter, light the first pilot. Just wave the BBQ lighter around near the pilot area and it will catch. It burns constantly unless the control is in the "pilot off" position. When you turn the oven temp control up, lets say to 350F the first pilot lights a second pilot which is larger. It heats a thermocouple, which then operates the gas valve to let gas flow to the burner. When the temp hits the set point, the second pilot is turned off, cooling the thermocouple which then shuts the gas off. This cycle continues to keep the temp constant. When you turn the oven to off, the second pilot light will not operate, but the first one stays on. Only if you turn the main control to "pilot off" will you completely cut the gas.
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