Samples of rare Toko and Simlar lenses/optics for large format and air photography and military devices.
Around 1937 a number of large format lenses were produced. Very seldom a field camera is spotted on which these a mounted. Next to an 21cm large format lens, there should also be a 18cm and 30cm been produced.
As said the companies main line of optical instrument production before 1945 was for the Japanese army, next to obvious items (binoculars and targeting devices) research was done into aerial photography for which some very rare Simlar lenses were produced.