In terms of history, there's two approaches here.
One is to learn more about these guns in general. The best starter here would be the "Standard Catalog of Smith & Wesson," which is the go-to book for many of us. There is also "Smith & Wesson" by Robert Neal and Roy Jinks, which tells much of the story behind the company and many of its guns.
In terms of your exact gun: you can request a factory letter from the Smith & Wesson Historical Foundation, which would tell you where the gun originally shipped to, when it shipped from the factory, and its original configuration. More often than not, these guns went to a major distributor, but it's still neat information. I think the factory letter currently costs $100.
Mike