Bought a bike from an 80’year old the other day. Story i got was 40 years ago . He bought a frame and fork for around $700. In a CA shop. Had it custom painted . So there are no stickers or identification tags at all. Bottom bracket has serial number (78C92667)
stamped the length of the bottom bracket across .
drop outs say Suntour GS . In a curved logo around drop out. I’m a newbie soI can’t post photos yet.

the components I think are good quality. It has campagnolia shift selectors on the frame rail, SuntourVx de railer at wheel, shimano hubs, shimano 600 breaks, shimano 600 levers on bars , crank sprocket says sugino , the handle bar mount or what I would call neck is stamped Technomic.

any help will be appreciated thanks in advance