Here is the catalog of Konno factory in the middle of 1970s. It must have been issued after 1974 because the address is Machida city. Konno factory has been well known among young cyclists as a brand Cherubim.
Mr. Konno who is the owner of the factory is famous as an expert of welding.

Super-touring and V which were introduced in this catalog have a long history. Those models have existed on the lineup until now with repeating minor change.
The factory has been aggressive to make new model as they had introduced a recumbent model since its early days.
This time, I don't make a comment because it would be enough if you read it.