According to stuff I’ve seen on the web, a 50" striper would be about 18 years old.
The formula for estimating weight is length x girth x girth / 800 which would put her at 49 pounds… since she was released and not killed and actually weighed let’s give it a bonus point and call it 50lbs.
What a great way to wind down the season and congrats to the guy that caught and released her. A beaut of a fish.