This handpainted sign with the inscription "Guide rail of 5th base missing" on the front and "Caution! Depth indicator misaligned" on the back were fitted near a shaft lift of the Maybach pit to call attention to the fact that a guide rail (which is a bar along which a conveyor cage is guided) is still missing at a certain base or that the depth indicator that shows the correct positions of cages is incorrectly adjusted.
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