Originally Posted by T-Mar
Araya did market bicycles under their own name in Japan, so I supsect that the frame was manufctured for Vista by Araya. I'd guess that ARY= Araya in the ARYL963661 serial number.
I had that thought as well when I saw the serial number but I haven't had time to mess with this until today. The serial number on my Araya bike is located in the same place and is ARYL107821. This bike is very similar in construction to my Araya - mine dates to 1981, was made with champion #1 and full dura ace. I don't think that they could have made a million of 'em...so at least one of those digits is a date code. Could the 600EX bike date from 1979?