Thats a nice classic bike, I had one for a short time. It was the top of the line model. three speed, rear wheel "hand cuff" lock, generator front hub, head light, tail light, racks, and a realy nice set of canvas bags. Dark green, flawless paint and pin striping. No dents or dings. I think mine was built in the late 50's or so.
I actually did a week long tour on it. It was a great bike in its time, but its time had passed. There are much better bikes out there now
I would not change anything on your bike, unless it can be undone. Your bike may, if its in good shape have colectors value. I paid $35 bucks for mine at a tag sale, sold it to a colector for much, much more. I was not trying to sell my bike, I was riding it around town, I had stopped at the post office when this guy walks up and asks if I wanted to sell it for his collection. His offer was just to much to pass up. He paid me $900 for a bike I bought for $35.
"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." - Arthur Conan Doyle