Yep, it's an M&P. You'll also see this called a "Pre-Model 10", since it's the model that later evolved to become the Model 10.
Based on the 1914 patent date, yours is obviously from some time after that. I have the same gun in the 472XXX serial number range, and mine is from the late 1920s / early 1930s, so yours is from before then - possibly early- to mid 1920s?
Edit - I confused your serial number and the number inside the crane. Since your serial number is 565XXX, it would have been made after mine, not before it. So you're probably looking at something from the 1930s.
Last edited by ScottRiqui; January 25, 2013 at 10:58 PM.