The original ‘Carton Optical Industries Ltd.’ was formed in Japan in 1930 as a spectacle trading company.
In 1951 they began trading various optical equipment and in 1964 expanded and supplied Japanese made well regarded porro binoculars and small astronomical and spotting telescopes to the International market under the 'Carton' name.
In 1988 they move there production to Thailand with a commensurate decline in quality.
The porros are classic post war Japanese binos with good optics almost on a par with Yashica and Ashai Pentax of the time.
This bino is quite heavy, 1220 gram.