Manufacturer : Taiyo-D0 Optical Works
Taiyo-Do Koki TKK Japan.
Same camera as the Epochs and the Meteor ,except for the name.
Bottom is marked Made in occupied Japan.
Lens : Vestkam f 3,5 20 mm
TKK shutter 1/25 ,1/50 ,B
This is the most common name of the 3 camera’s mentioned here.