The shifters were ordered removed on all bikes after 1973 by the bureaucratic disaster we all know and love as the CPSC, or Consumer Products Safety Commission.
Somewhere along the way an owner disconnected the 3 speed shifter and hooked the rear brake to the shift lever. Ross shifters only had shift function.
The seat and rear tire are original to that model. The yellow paint would've been cool to see before it got baked off by sun and time. The bars look like the Stingray Fastback bends, but Wald made them so they could be original.
I can take a shot at the serial number later today. Ross is one of the very few bike companies from that era that is still here in the US and owned by the same family. They also have all the old info from what I understand.
I wll see what I can find.
Rob