This pic shows where the two locking bolts (with top holes) engage the electrical contacts at 110° and 70°:
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Here is the crane hinge pin (journal) emerging from the sleeve so I assume there is a bottom pin as well that is not visible. This leads me to believe the hinge sleeves were attached to the door then it was 'dropped' into place atop the pins:
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Here is the Cleveland Federal Reserves crane hinge without hinge pins, from a Popular Science article:
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