My husband kept the combination on two punched cards. Apart they are nothing but speckle. One on top of the other, properly placed, the number comes out.
Drag the top card, or nudge it with the arrows, until the two screens agree.
The two screens are fighting each other.
Once the card is nearly there, this button takes up the last hair for you.
Two punched cards from a Jacquard loom, speckled with the same patience it takes to punch a damask. On their own they say nothing. Laid one over the other, and only if they sit exactly square, a figure appears that is drawn on neither of them.
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