The rear derailleur freewheel/cassette and chainwheels are probably the first to be changed on a bike.On a vintage bike in excellent condition (that apparently had a lonely existence in a garage) all of the components likely are original.
Some bike parts have a date code cast or stamped into the piece.
When it comes to the ultimate in cycle design then the Campagnolo Delta brake will rate very high.
If you want real points for style on your post-1986 Italian machine then this is the brake for you.
This allows the cage to follow the gradient of the block as it shifts up and down. block, featuring light alloy cogs and body parts, was ridiculously expensive.
Above: the Record side-pull brake, from 1968, was lightyears ahead of everything else on the market at the time for stopping power, and were the only side-pulls which reliably stayed centered.