The diagram no 1 has three variations of the same diamensions with different locking folds
The diagram no 2, 3 and 4 are another variations of the diagram 1.
ELFA-Blog archive of correspondance between Swamynathan and Elsje van der Ploeg Subjects are: origami creations, envelope and letterfolds If you have questions or other reactions, please contact: swamyxyz@yahoo.com