Well since you asked, I would not write what you wanted to on it. I know it is nice, and it is something you WANT to say, but ask yourself if you are REALLY hoping to spark some memories in her. You may be looking for a response and you most likely will not get one. A picture collage (spelling?) covering your entire 17 years of marriage may be something to consider. Wedding/child births/fun times together etc. No words, just a collage. She will get the idea, and since it is an anniversary it is appropriate to cover those 17 years.
Me: 42 W: 32 Married 7 years together 8.5 S1: 7 S2:7 Bomb #1: 09-16-13 Recon #1: 11/13 A discovered 04-03-2014 W filed D 05-19-14 but never served me I filed D 12-02-2014 S 05-31-14 Divorced 5-19-16