Will confirm that is a Tange no.2 frame, this was a sub $300 bike of the day. I had this in silver. I think the derailers are original, I know the cranks are. The saddle is Sekai deluxe, I like that more than the avocet. I replaced the diacomp with royal gran comp and put speedy aero wheels on.

Not sure what happened on this one, it developed binding in the headset. I eventually took it apart and donated it to the local coop.