This is the very desirable Smith & Wesson Highway Patrolman .357 Magnum Model 28-2. The gun is very clean and is in great shape. It would make a great item for a collector or a great personal defense weapon.
The Smith & Wesson Highway Patrolman .357 Magnum Model 28-2 was produced between 1961 and 1981. The Model 28-2 is a variant of the Model 28, a more affordable version of the Model 27, designed for law enforcement use.
The Smith & Wesson Highway Patrolman Model 28-2 with serial number S206573 was likely manufactured in 1961 or 1962.
Smith & Wesson revolvers with serial numbers in the S200000 – S220000 range were produced during that time period. If you want a more precise date, you can contact Smith & Wesson directly, as they can provide exact manufacturing details based on the serial number.