Preliminary identification
Photo reference
2 uploaded photos
Overview
This lot features six vintage turned-wood desk rubber stamps, notably including an official 'DU PONT CONFIDENTIAL' corporate stamp produced by Franklin Rubber Stamp Co. of Wilmington, Delaware. These functional office artifacts represent mid-century industrial corporate bureaucracy, trade secret management, and administrative history from one of America's chemical giants.
Story
Wilmington, Delaware was the undisputed powerhouse of the DuPont chemical empire. These stamps were the front lines of corporate security, marking classified chemical research and internal patents before digital encryption existed.
Maker / Origin
The stamped handle identifies Franklin Rubber Stamp Co., a commercial stationer and marking device maker based in Wilmington, Delaware. They supplied custom marking devices to local industrial titans, most notably E. I. du Pont de Nemours and Company, whose headquarters were just blocks away.
Condition & Value
Good vintage condition consistent with age and office use. The turned handles exhibit minor surface wear, light scuffing, and ink staining around the collars; rubber matrices remain intact with expected ink residue.
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Comparable demand stays strongest where maker, originality, and venue confidence line up. Broader examples still trade, but the range tightens quickly when provenance, condition, or selling lane fit is missing.
Best Venue
Specialty auction or a focused dealer with buyers already in this lane.
Signed example with light edge wear and original frame.
Comparable format with stronger provenance and cleaner surface.
Smaller related piece with visible craquelure and trimmed margins.
Period match with softer condition and weaker subject matter.
Close market lane comp with similar material and presentation.