Model : Simple chess board envelope by Michel Grand
(front and back)
Folded and sent by : Michel Grand
Special : From a bicolor A4
Received : 23 November 2010
Diagram published in MFPP's Convention 2011
Origamailart : Inspiration of Envelopes and LetterFolds Association (ELFA) - Exchange of handfolded letters and envelopes - To join our mailing list https://groups.google.com/g/elfagroup