The sad reality is that if you show an old book to a "spiritual" JW today, you will immediately be flagged as an apostate. I remember, in my initial stages of questioning the "truth", I was about to share writings of Charles Russel with a friend of mine. He literally fled my house telling me that he would not hear anything that would cause his faith to be stumbled. We were talking, he stood up and walked out of my house, mid conversation! In the end, his irrational reaction had a higher negative impact on my faith than the writings of Charles Russel!!
So, yeah, having old literature is a good thing for confirming your own decisions. Then, later, you can use these to discuss with people who were never JWs or that have since left the cult. But you will have next to no success with the JWs themselves. They view anyone digging the past in a very bad light.