There's no information about the dates of creation of either unit in either of the books as far as I can tell, unfortunately.
Correction: Hisashi Abe is in fact the author of these two books I referred to in my previous post. goo.gl/BDAv84 goo.gl/KeKcun One of these is also available from the excellent Viereck Verlag, who also stock another Abe title. Viereck Verlag is a highly recommended source of origami books and paper. They're based in Freising Germany, and have a range of quality products. http://www.viereck-verlag.de/index.php?action=einzel_produkt&product_id=792&category_filter_id=1&accordion= http://www.viereck-verlag.de/index.php?action=einzel_produkt&product_id=151&category_filter_id=1&accordion= Yours Dave Brill www.brilliantorigami.com http://digitalorigami.com/oac/# http://www.flickr.com/photos/brill/ On 28 January 2017 at 13:52, David Mitchell <davidmitchell...@btinternet.com > wrote: > Dave Brill <dave.br...@btopenworld.com> wrote: > > >Some more information about the similar Norishige Terada and Hisashi Abe > 60 > degree units from bronze rectangles. > > Thanks. That was very helpful. > > So if I understand correctly the Terada unit goes back to at least 1980? > > I am wondering if the Abe unit came later and was a simplification of the > Terada unit or was contemporaneous? > > Any further information greatly appreciated! > > Dave > > >
