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An invertible, foldable sign formed of an integral blank synthetic resin material permits repeated folding and reversibility for display of multiple messages. The sign has opposite side panels joined by an integral resilient hinge, which panels are latchable into display configuration by integral ta

An invertible, foldable sign formed of an integral blank synthetic resin material permits repeated folding and reversibility for display of multiple messages. The sign has opposite side panels joined by an integral resilient hinge, which panels are latchable into display configuration by integral tabs. The sign is self-latching for shipping or storage.

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A durable, invertible, self-supporting sign formed of a single synthetic resin material board blank, comprising two stiffly resilient side panels, each side-panel having two flat surfaces for display of visual messages, said side panels when erected having an upper edge comprising a common integral

A durable, invertible, self-supporting sign formed of a single synthetic resin material board blank, comprising two stiffly resilient side panels, each side-panel having two flat surfaces for display of visual messages, said side panels when erected having an upper edge comprising a common integral resilient hinge for permanently reversibly interengaging said side panels, said side panels further having base portions for contacting a ground or floor surface and supporting the erected sign, said base portions forming legs located at each lower corner of the base portions for supporting the sign and raising it from the ground or floor surface, whereby to permit upright durable selective display of multiple different messages on the reverse sides of the sign and to permit selectively opened-flat or folded-flat shipping and storage of said sign.