1st April: Just fold it

Model: Poissenveloppe (1990) by Michel Grand

Folded and sent by: Michel Grand

Special: Fish stamp.

Diagrams (Fish letterfold) in:
"The New Origami" by Steve and Megumi Biddle (1993),
Le Pli 65 (03-1996), Pliages 4 (1998) and ELFA 5th ed (1998)