If the Royce Union name has any historical significance, it's because it was the first brand of Japanese bike imported into the U.S. - well before Fuji, Nishiki, etc. In fact, well before the 60's/70's bike boom. As previously mentioned, they were built down to a price point, and almost all were small frames, as it hadn't occurred to that Japanese that American riders were a bit taller. I remember them primarily as cheap copies of Raleigh 3-speed "English racers".

Syke
Deranged Few M/C