Very nice!
I'd gently clean it up and ride it on special days
it's the cycling equivalent of finding Dad's old Tag Heuer watch , stuffed in a drawer and forgotten about for 30 years
Value? Probably $1500 if you still have the wheels. Compared to the cost of an equivalent new bike, (probably cost $8000 to get this level of bike new) old bikes are a bargain, but the pristine condition of yours makes it sweeter