Old 'boo rods are pretty cool. Do a google search on the Wright and McGill Granger Aristocrat. There is a lot of information on them. They can be worth several hundred dollars if they are in good condition and haven't been messed with.
I'm not real familiar with the intricacies of bamboo rods but two tips were a common thing. I'm not sure if one is a spare as they are easy to break or what. I've had folks tell me one tip might be a dry fly tip and the other a wet fly tip, I've heard spare, and I've heard after a day of fishing its best to rest a tip and let it recover, so use the other tip the next day.
There are several dedicated forums out there.
I have my granfathers South Bend 3 piece 9' rod. I keep thinking about using it, but haven't in years.
Should be a number on it or on the tube label, 7030, 8040, 9053. First 2 numbers are length, second 2 numbers are weight. From what I read the 9' rod is probably a 6wt, the 8 foot rod is a 4 weight.