3 hearts

Model: Envelove 4 September (2005) by Michel Grand

Folded and sent by: Michel Grand, France

Special: Relief, stamp and postmark = heart
Diagram published in: Xmas Origami Book 2012, BOS Convention Spring 2013, MFPP's Convention 2013 and CDO's Convention 2013

Traditional Japanese heart letterfold

Folded by: Hella von Beckenrath

Special: Printed paper, Germany
Traditional Japanese heart diagram

Japanese heart letterfold in seedpackage (traditionals)

Folded and sent by: Edda Beer, Germany