The serial number says you have (at least might have) a 3rd Model (.44 Hand Ejector 3rd Model---a k a Model of 1926). One might think of this as a solution in search of a problem.
The .44 1st Model (The Triple Lock) began the series of .44 HE's. Popular lore has it it didn't sell well (at $21), so they did away with the third lock and the ejector rod shroud, which enabled a lower price ($19-----for what is now the .44 HE 2nd Model). So far so good.
Enter a Texas distributor (Wolf & Klar) who was looking for something the same only different. Continuing with popular lore, W&K's customer's (those who wore badges) were complaining about bending the (now unprotected) ejector rod when they found it necessary to maintain law and order by whacking the bad guys on the head with the barrel of their 2nd Models---those without ejector rod protection. W&K, ever mindful of the old saying "Money talks and----------------", placed an order for 3,500 such revolvers. Having thus attracted S&W's attention, they went on to get themselves an exclusive for this gun----from 1926 to 1936.
The forgoing has been presented for your enlightenment and entertainment----IF your revolver has an ejector rod housing. If it doesn't have such, then you're stuck with a plain old 2nd Model. I'd explain why two different models are in the same serial number series, but it would probably make sense, and bore you to tears.
Ralph Tremaine