Primo
For the Primoflex and Primo Junior TLR cameras, see Topcon.
The Primo (プリモ) was a 4.5×6 folding camera made by Daiichi around 1942. It had a horizontal folding body, unusual for a 4.5×6 format camera. It was equipped with a folding optical finder and a body release. The shutter plate was marked PRIMO on top. The Primo has been observed with chrome finish, but McKeown also mentions a black variant.
An ad for the Primo appeared in the 23/12/1942 issue of Asahi Graph (visible in this page). It shows the company name Daiichi Kikō K.K. (第一機工株式會社) together with the distributor's name K.K. Ōsawa Shōkai (株式會社大澤商會). Two variants were advertised, the Primo I (プリモⅠ型) with f:4.5 lens for ¥136 and the Primo II (プリモⅡ型) with f:3.5 lens for ¥160, both with body release.