Re: model 59
Ive never owned a 59, but am pretty familiar with em, and have fired a few. If I remember correctly; (its been a long time) the rear sight is dovetailed into the slide and the front sight is staked. Any quality gunsmith should be able to replace these sights with higher visibility sights, and I am pretty sure that the Novak system is available for the 59-series of Smith & Wessons. I would not be a bit surprised if there are other sights like the fiber optic type that are available for the 59 series that are possibly less expensive than Novak's.