On April 16th, to celebrate our 49th anniversary, (coincidentally the day before the 50th anniversary of Apollo XIII) my wife presented me with a copy of "A Moonwatch Story" as a companion to my Speedmaster which was purchased last July 20th, also with her help.
And the 50th anniversary watch should be available in time for your 50th.... start dropping the hints now.... And compliments to your wife, a good gift!