I believe that the gents are wearing Knights Pythias uniforms, a fraternal orginazation--possibly part of the I.O.O.F. (Independent Order Of Odd Fellows). I cannot tell from the small insets of the brasses, but I suspect that the shield reads: "Patriarch Militant/Justita Universalis," and displays a crown, crook and sword. I hope that this helps.
To Join the Company of Military Historians click here