thanks. Good to know, it means DIY 5x7/13x18 back is doable.
I tried to find pages about this older camera, by using online translation, but not much finds. For instance:
http://je2luz.g1.xrea.com/toyofield01.htm
it says body only is 2,8kg.
an idea of the size, folded, vs the 5x7 Graflex Crown Graphic:
exploration of web.archive.org brings nothings, for instance 1999:
http://web.archive.org/web/199904230...p/maincame.htm
a succinct timeline of Toyo cameras on wikipedia in japanese:
https://ja.wikipedia.org/wiki/%E3%83%88%E3%83%A8
On the other hand the 4x5 Toyo are massively available and documented. Somehow I find it weird, because the size 4"x5" is not much bigger than 6x9cm. 13x18/5"x7"/4¾"x6½" is ideal, still compact enough but almost twice the size.
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