A. Part of the mechanism used to adjust an early dental chair
B. A ridgepole corner brace from a World War II army tent
C. A film splicer that attached to the side of an early 16 millimeter projector
D. A device for mitering the corners of decorative borders used in fine printing
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LAUGHING DOWN THE ROAD Caution: Funny Signs Ahead
What IS This Thing?
A.
