Experimental Envelope - Printable Version

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Experimental Envelope - RICHARD - 16-10-2025

[attachment=866](Pull out for Postal Inspection).I could be wrong but ill check this cover out. When they applied for a postal contract they would send in there new ideas/Experimental covers like this one. The idea was to let postal inspectors lift the flap on the cover to inspect what was inside it. These are vary rare, they were not used long. Maybe a week up to only one month. Ill have the experts look at it but I remember them talking about it a few years ago. These envelops/covers had no patents in place unless they got the contract to supply them. This one was never accepted if I remember correct, When they pulled the flap out it ripped and was hard to put back in place. It also did not reveal all the contents in the cover. Notice the one back flap has all the glue showing but on the other there is only a drop on glue under the top flap to hold the entire end of the cover to gather. It was rejected. Only a few used copies exist there are more not used copies then used copies. Feel free to add any comments on this subject. Thank you

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RE: Experimental Envelope - RICHARD - 17-10-2025

No, it's the normal envelope for third-class mail that had to be sent unsealed so it could be inspected. This could be achieved either by not sealing the flap or by leaving one side panel unglued... Ken answered my question I guess I'm still learning

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