A rare, complete, illustrated box from the late 19th/early 20th century for the Cachet Crampon device, invented to make envelopes "absolutely tamper-proof." Produced by the renowned Blanzy Poure & Cie factory, this invention combined a metal tool with a wooden handle and crimped lead discs, allowing for the sealing of mail or confidential documents. The lid, finely lithographed in red, black, and gray, displays superb industrial design with ribboned typography.
✦ Origin: Blanzy Poure, Boulogne-sur-Mer ✦ Estimated period: Circa 1900 ✦ Dimensions: 17 × 9 × 4 cm ✦ Material: cardboard box, lithographed label ✦ Contents: device + approx. 50 original stamps ✦ Condition: very good overall condition, vibrant colors, slight wear on the edges; functional mechanism
Superb witness to the history of secure correspondence and French postal inventions – a sought-after piece for a collection of antique office items, stationery or industrial advertising .
