A vintage bicycle can be hard to maintain due to its age and finding parts for it. The best place to find parts for vintage bicycle parts is online. Many online sites exclusively sell parts vintage bicycle parts. Chances are online you can find exactly what you need for your bicycle no matter how old it is or what brand it is.
If you need more help finding the parts to your vintage bicycle you should find a local bike shop. They may have some information on what you are looking for or what you need. Talking to anyone with a good knowledge of bicycles can really help you to find details about your vintage bicycle. If that fails you can research up on the bicycle that you have and find information that you need. The part you may need might be rare but its not impossible to find the one you need.
One of the downsides to having a vintage bicycle, whether you ride it or you just want to restore it, is the lack of parts that are out there. When you are talking about a bike that was made 50 years, you aren't exactly somethign that you can just walk down to the local store and get Vintage Bicycle Parts for. The good news is that there are plenty of online options to help you find the parts that you need.
The great thing about the internet is that what used to take months to track down can now be done in seconds. If you are looking for Vintage Bicycle Parts you can find dozens of websites that have what you need online, which means you can also price match as well.